139684608 has 144 divisors (see below), whose sum is σ = 472245760. Its totient is φ = 39896064.

The previous prime is 139684591. The next prime is 139684613. The reversal of 139684608 is 806486931.

139684608 is a `hidden beast` number, since 1 + 39 + 6 + 8 + 4 + 608 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×139684608² = 39023579424227328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46941 + ... + 49827.

Almost surely, 2^139684608 is an apocalyptic number.

139684608 is a gapful number since it is divisible by the number (18) 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 139684608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236122880).

139684608 is an abundant number, since it is smaller than the sum of its proper divisors (332561152).

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

139684608 is an equidigital number, since it uses as much as digits as its factorization.

139684608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919 (or 2899 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 139684608 is about 11818.8243070113. The cubic root of 139684608 is about 518.8591953225.

The spelling of 139684608 in words is "one hundred thirty-nine million, six hundred eighty-four thousand, six hundred eight".