138263670 has 24 divisors (see below), whose sum is σ = 359485776. Its totient is φ = 36870288.

The previous prime is 138263659. The next prime is 138263701. The reversal of 138263670 is 76362831.

It is a happy number.

138263670 is a `hidden beast` number, since 13 + 8 + 2 + 636 + 7 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 768042 + ... + 768221.

It is an arithmetic number, because the mean of its divisors is an integer number (14978574).

Almost surely, 2^138263670 is an apocalyptic number.

138263670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138263670 is an abundant number, since it is smaller than the sum of its proper divisors (221222106).

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

138263670 is a wasteful number, since it uses less digits than its factorization.

138263670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536276 (or 1536273 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 138263670 is about 11758.5573094662. The cubic root of 138263670 is about 517.0938351903.

The spelling of 138263670 in words is "one hundred thirty-eight million, two hundred sixty-three thousand, six hundred seventy".