138402310 has 32 divisors (see below), whose sum is σ = 255415680. Its totient is φ = 53972352.

The previous prime is 138402307. The next prime is 138402317. The reversal of 138402310 is 13204831.

138402310 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138402310² = 38310398826672200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138402317) 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, 182452 + ... + 183208.

It is an arithmetic number, because the mean of its divisors is an integer number (7981740).

Almost surely, 2^138402310 is an apocalyptic number.

138402310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138402310 is a deficient number, since it is larger than the sum of its proper divisors (117013370).

138402310 is a wasteful number, since it uses less digits than its factorization.

138402310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 138402310 is about 11764.4511134179. The cubic root of 138402310 is about 517.2666112131.

The spelling of 138402310 in words is "one hundred thirty-eight million, four hundred two thousand, three hundred ten".