138474960 has 80 divisors (see below), whose sum is σ = 462303744. Its totient is φ = 34085376.

The previous prime is 138474949. The next prime is 138474961. The reversal of 138474960 is 69474831.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138474961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19072 + ... + 25311.

Almost surely, 2^138474960 is an apocalyptic number.

138474960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138474960 is an abundant number, since it is smaller than the sum of its proper divisors (323828784).

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

138474960 is a wasteful number, since it uses less digits than its factorization.

138474960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44412 (or 44406 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 138474960 is about 11767.5384001923. The cubic root of 138474960 is about 517.3571030693.

The spelling of 138474960 in words is "one hundred thirty-eight million, four hundred seventy-four thousand, nine hundred sixty".