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139868510 = 2537378023
BaseRepresentation
bin10000101011000…
…11100101011110
3100202012001112012
420111203211132
5241301243020
621513511222
73315601625
oct1025434536
9322161465
10139868510
1171a52311
123aa12512
1322c92542
141480c6bc
15c42c7c5
hex856395e

139868510 has 16 divisors (see below), whose sum is σ = 258568416. Its totient is φ = 54435168.

The previous prime is 139868501. The next prime is 139868539. The reversal of 139868510 is 15868931.

139868510 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188642 + ... + 189381.

It is an arithmetic number, because the mean of its divisors is an integer number (16160526).

Almost surely, 2139868510 is an apocalyptic number.

139868510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139868510 is a deficient number, since it is larger than the sum of its proper divisors (118699906).

139868510 is a wasteful number, since it uses less digits than its factorization.

139868510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378067.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 139868510 is about 11826.6017942603. The cubic root of 139868510 is about 519.0867971103.

The spelling of 139868510 in words is "one hundred thirty-nine million, eight hundred sixty-eight thousand, five hundred ten".

Divisors: 1 2 5 10 37 74 185 370 378023 756046 1890115 3780230 13986851 27973702 69934255 139868510