49139964 has 36 divisors (see below), whose sum is σ = 125385624. Its totient is φ = 16225632.

The previous prime is 49139963. The next prime is 49139969. The reversal of 49139964 is 46993194.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49139963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2527 + ... + 10230.

It is an arithmetic number, because the mean of its divisors is an integer number (3482934).

Almost surely, 2^49139964 is an apocalyptic number.

It is an amenable number.

49139964 is an abundant number, since it is smaller than the sum of its proper divisors (76245660).

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

49139964 is a wasteful number, since it uses less digits than its factorization.

49139964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12874 (or 12869 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 49139964 is about 7009.9902995653. The cubic root of 49139964 is about 366.2786554787.

The spelling of 49139964 in words is "forty-nine million, one hundred thirty-nine thousand, nine hundred sixty-four".