138464424 has 64 divisors (see below), whose sum is σ = 439574400. Its totient is φ = 39560832.

The previous prime is 138464387. The next prime is 138464453. The reversal of 138464424 is 424464831.

138464424 is a `hidden beast` number, since 1 + 3 + 8 + 4 + 644 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44277 + ... + 47300.

It is an arithmetic number, because the mean of its divisors is an integer number (6868350).

Almost surely, 2^138464424 is an apocalyptic number.

138464424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138464424 is an abundant number, since it is smaller than the sum of its proper divisors (301109976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138464424 is a wasteful number, since it uses less digits than its factorization.

138464424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91599 (or 91589 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 138464424 is about 11767.0907194599. The cubic root of 138464424 is about 517.3439815329.

The spelling of 138464424 in words is "one hundred thirty-eight million, four hundred sixty-four thousand, four hundred twenty-four".