138802730 has 24 divisors (see below), whose sum is σ = 274625316. Its totient is φ = 50473280.

The previous prime is 138802691. The next prime is 138802789. The reversal of 138802730 is 37208831.

138802730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 136726249 + 2076481 = 11693^2 + 1441^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56147 + ... + 58566.

Almost surely, 2^138802730 is an apocalyptic number.

138802730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138802730 is a deficient number, since it is larger than the sum of its proper divisors (135822586).

138802730 is a wasteful number, since it uses less digits than its factorization.

138802730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114742 (or 114731 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 138802730 is about 11781.4570406211. The cubic root of 138802730 is about 517.7649758945.

The spelling of 138802730 in words is "one hundred thirty-eight million, eight hundred two thousand, seven hundred thirty".