138802390 has 16 divisors (see below), whose sum is σ = 250117632. Its totient is φ = 55460224.

The previous prime is 138802387. The next prime is 138802393. The reversal of 138802390 is 93208831.

138802390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138802387) and next prime (138802393).

It is a super-2 number, since 2×138802390² = 38532206939424200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138802393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2667 + ... + 16873.

It is an arithmetic number, because the mean of its divisors is an integer number (15632352).

Almost surely, 2^138802390 is an apocalyptic number.

138802390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138802390 is a deficient number, since it is larger than the sum of its proper divisors (111315242).

138802390 is a wasteful number, since it uses less digits than its factorization.

138802390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15191.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 138802390 is about 11781.4426111576. The cubic root of 138802390 is about 517.7645531357.

The spelling of 138802390 in words is "one hundred thirty-eight million, eight hundred two thousand, three hundred ninety".