139939616 has 24 divisors (see below), whose sum is σ = 285008220. Its totient is φ = 67556608.

The previous prime is 139939603. The next prime is 139939627. The reversal of 139939616 is 616939931.

It can be written as a sum of positive squares in 2 ways, for example, as 135955600 + 3984016 = 11660^2 + 1996^2 .

It is a super-2 number, since 2×139939616² = 39166192252454912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74471 + ... + 76326.

Almost surely, 2^139939616 is an apocalyptic number.

139939616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139939616 is an abundant number, since it is smaller than the sum of its proper divisors (145068604).

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

139939616 is a wasteful number, since it uses less digits than its factorization.

139939616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150836 (or 150828 counting only the distinct ones).

The product of its digits is 236196, while the sum is 47.

The square root of 139939616 is about 11829.6076012689. The cubic root of 139939616 is about 519.1747462200.

The spelling of 139939616 in words is "one hundred thirty-nine million, nine hundred thirty-nine thousand, six hundred sixteen".