49639478 has 16 divisors (see below), whose sum is σ = 86123520. Its totient is φ = 21017256.

The previous prime is 49639477. The next prime is 49639523. The reversal of 49639478 is 87493694.

It is a super-2 number, since 2×49639478² = 4928155552224968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49639477) 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, 20198 + ... + 22521.

It is an arithmetic number, because the mean of its divisors is an integer number (5382720).

Almost surely, 2^49639478 is an apocalyptic number.

49639478 is a deficient number, since it is larger than the sum of its proper divisors (36484042).

49639478 is a wasteful number, since it uses less digits than its factorization.

49639478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42811.

The product of its digits is 1306368, while the sum is 50.

The square root of 49639478 is about 7045.5289368507. The cubic root of 49639478 is about 367.5155635348.

It can be divided in two parts, 4963 and 9478, that added together give a palindrome (14441).

The spelling of 49639478 in words is "forty-nine million, six hundred thirty-nine thousand, four hundred seventy-eight".