138607464 has 32 divisors (see below), whose sum is σ = 349020000. Its totient is φ = 45868992.

The previous prime is 138607463. The next prime is 138607481. The reversal of 138607464 is 464706831.

It is a super-2 number, since 2×138607464² = 38424058153022592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138607463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17439 + ... + 24110.

It is an arithmetic number, because the mean of its divisors is an integer number (10906875).

Almost surely, 2^138607464 is an apocalyptic number.

It is an amenable number.

138607464 is an abundant number, since it is smaller than the sum of its proper divisors (210412536).

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

138607464 is a wasteful number, since it uses less digits than its factorization.

138607464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41697 (or 41693 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 138607464 is about 11773.1671184945. The cubic root of 138607464 is about 517.5220667852.

The spelling of 138607464 in words is "one hundred thirty-eight million, six hundred seven thousand, four hundred sixty-four".