138965064 has 64 divisors (see below), whose sum is σ = 409866240. Its totient is φ = 38422080.

The previous prime is 138965053. The next prime is 138965077. The reversal of 138965064 is 460569831.

It is a super-2 number, since 2×138965064² = 38622578025048192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 8134 + ... + 18549.

It is an arithmetic number, because the mean of its divisors is an integer number (6404160).

Almost surely, 2^138965064 is an apocalyptic number.

138965064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138965064 is an abundant number, since it is smaller than the sum of its proper divisors (270901176).

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

138965064 is a wasteful number, since it uses less digits than its factorization.

138965064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26730 (or 26726 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 138965064 is about 11788.3444130209. The cubic root of 138965064 is about 517.9667445345.

The spelling of 138965064 in words is "one hundred thirty-eight million, nine hundred sixty-five thousand, sixty-four".