138756430 has 16 divisors (see below), whose sum is σ = 262907280. Its totient is φ = 52581312.

The previous prime is 138756427. The next prime is 138756437. The reversal of 138756430 is 34657831.

It is a self number, because there is not a number n which added to its sum of digits gives 138756430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138756437) 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, 364959 + ... + 365338.

It is an arithmetic number, because the mean of its divisors is an integer number (16431705).

Almost surely, 2^138756430 is an apocalyptic number.

138756430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138756430 is a deficient number, since it is larger than the sum of its proper divisors (124150850).

138756430 is a wasteful number, since it uses less digits than its factorization.

138756430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730323.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 138756430 is about 11779.4919245271. The cubic root of 138756430 is about 517.7073997350.

The spelling of 138756430 in words is "one hundred thirty-eight million, seven hundred fifty-six thousand, four hundred thirty".