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139081800 = 2335211131621
BaseRepresentation
bin10000100101000…
…11100001001000
3100200201002100210
420102203201020
5241101104200
621445001120
73306114204
oct1022434110
9320632323
10139081800
1171565240
123a6b31a0
1322a78430
1414685b04
15c324650
hex84a3848

139081800 has 192 divisors, whose sum is σ = 506842560. Its totient is φ = 31104000.

The previous prime is 139081763. The next prime is 139081837. The reversal of 139081800 is 8180931.

It is an interprime number because it is at equal distance from previous prime (139081763) and next prime (139081837).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84990 + ... + 86610.

It is an arithmetic number, because the mean of its divisors is an integer number (2639805).

Almost surely, 2139081800 is an apocalyptic number.

139081800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139081800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253421280).

139081800 is an abundant number, since it is smaller than the sum of its proper divisors (367760760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139081800 is a wasteful number, since it uses less digits than its factorization.

139081800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664 (or 1655 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 139081800 is about 11793.2947050432. The cubic root of 139081800 is about 518.1117412720. Note that the first 3 decimals are identical.

The spelling of 139081800 in words is "one hundred thirty-nine million, eighty-one thousand, eight hundred".