138366250 has 80 divisors (see below), whose sum is σ = 293531040. Its totient is φ = 48440000.

The previous prime is 138366223. The next prime is 138366251. The reversal of 138366250 is 52663831.

138366250 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (138366251) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 398577 + ... + 398923.

It is an arithmetic number, because the mean of its divisors is an integer number (3669138).

Almost surely, 2^138366250 is an apocalyptic number.

138366250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138366250 is an abundant number, since it is smaller than the sum of its proper divisors (155164790).

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

138366250 is a wasteful number, since it uses less digits than its factorization.

138366250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 138366250 is about 11762.9184303896. The cubic root of 138366250 is about 517.2216836051.

The spelling of 138366250 in words is "one hundred thirty-eight million, three hundred sixty-six thousand, two hundred fifty".