138291370 has 32 divisors (see below), whose sum is σ = 286416000. Its totient is φ = 47092416.

The previous prime is 138291323. The next prime is 138291371. The reversal of 138291370 is 73192831.

It is not an unprimeable number, because it can be changed into a prime (138291371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3801 + ... + 17059.

It is an arithmetic number, because the mean of its divisors is an integer number (8950500).

Almost surely, 2^138291370 is an apocalyptic number.

138291370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138291370 is an abundant number, since it is smaller than the sum of its proper divisors (148124630).

138291370 is a wasteful number, since it uses less digits than its factorization.

138291370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13422.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 138291370 is about 11759.7351160645. The cubic root of 138291370 is about 517.1283647304.

The spelling of 138291370 in words is "one hundred thirty-eight million, two hundred ninety-one thousand, three hundred seventy".