138490368 has 40 divisors (see below), whose sum is σ = 368951088. Its totient is φ = 46162944.

The previous prime is 138490349. The next prime is 138490379. The reversal of 138490368 is 863094831.

It is a happy number.

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, 43546 + ... + 46617.

Almost surely, 2^138490368 is an apocalyptic number.

It is an amenable number.

138490368 is an abundant number, since it is smaller than the sum of its proper divisors (230460720).

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

138490368 is an frugal number, since it uses more digits than its factorization.

138490368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90184 (or 90168 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 138490368 is about 11768.1930643578. The cubic root of 138490368 is about 517.3762909971.

The spelling of 138490368 in words is "one hundred thirty-eight million, four hundred ninety thousand, three hundred sixty-eight".