138995946 has 32 divisors (see below), whose sum is σ = 322312320. Its totient is φ = 44317152.

The previous prime is 138995933. The next prime is 138995999. The reversal of 138995946 is 649599831.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 138995892 and 138995901.

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, 54715 + ... + 57198.

It is an arithmetic number, because the mean of its divisors is an integer number (10072260).

Almost surely, 2^138995946 is an apocalyptic number.

138995946 is an abundant number, since it is smaller than the sum of its proper divisors (183316374).

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

138995946 is a wasteful number, since it uses less digits than its factorization.

138995946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111947 (or 111941 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 138995946 is about 11789.6541934019. The cubic root of 138995946 is about 518.0051106863.

The spelling of 138995946 in words is "one hundred thirty-eight million, nine hundred ninety-five thousand, nine hundred forty-six".