49215728 has 20 divisors (see below), whose sum is σ = 95653848. Its totient is φ = 24530880.

The previous prime is 49215707. The next prime is 49215737. The reversal of 49215728 is 82751294.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 49215691 and 49215700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650 + ... + 9942.

Almost surely, 2^49215728 is an apocalyptic number.

It is an amenable number.

49215728 is a deficient number, since it is larger than the sum of its proper divisors (46438120).

49215728 is a wasteful number, since it uses less digits than its factorization.

49215728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9632 (or 9626 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 49215728 is about 7015.3922199689. The cubic root of 49215728 is about 366.4668016362.

The spelling of 49215728 in words is "forty-nine million, two hundred fifteen thousand, seven hundred twenty-eight".