138570916 has 12 divisors (see below), whose sum is σ = 264544560. Its totient is φ = 62986760.

The previous prime is 138570871. The next prime is 138570917. The reversal of 138570916 is 619075831.

It is a super-2 number, since 2×138570916² = 38403797522158112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138570917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1574626 + ... + 1574713.

It is an arithmetic number, because the mean of its divisors is an integer number (22045380).

Almost surely, 2^138570916 is an apocalyptic number.

It is an amenable number.

138570916 is a deficient number, since it is larger than the sum of its proper divisors (125973644).

138570916 is a wasteful number, since it uses less digits than its factorization.

138570916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149354 (or 3149352 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 138570916 is about 11771.6148424929. The cubic root of 138570916 is about 517.4765760672.

The spelling of 138570916 in words is "one hundred thirty-eight million, five hundred seventy thousand, nine hundred sixteen".