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139426990 = 2515788807
BaseRepresentation
bin10000100111101…
…11110010101110
3100201100121212121
420103313302232
5241143130430
621500223154
73312052453
oct1023676256
9321317777
10139426990
117178061a
123a83aaba
1322b695a1
141473582a
15c391a7a
hex84f7cae

139426990 has 16 divisors (see below), whose sum is σ = 252569952. Its totient is φ = 55414944.

The previous prime is 139426981. The next prime is 139426993. The reversal of 139426990 is 99624931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139426993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42834 + ... + 45973.

It is an arithmetic number, because the mean of its divisors is an integer number (15785622).

Almost surely, 2139426990 is an apocalyptic number.

139426990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139426990 is a deficient number, since it is larger than the sum of its proper divisors (113142962).

139426990 is a wasteful number, since it uses less digits than its factorization.

139426990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88971.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 139426990 is about 11807.9206467523. The cubic root of 139426990 is about 518.5400245659.

The spelling of 139426990 in words is "one hundred thirty-nine million, four hundred twenty-six thousand, nine hundred ninety".

Divisors: 1 2 5 10 157 314 785 1570 88807 177614 444035 888070 13942699 27885398 69713495 139426990