49015978 has 16 divisors (see below), whose sum is σ = 80318304. Its totient is φ = 22249360.

The previous prime is 49015973. The next prime is 49015979. The reversal of 49015978 is 87951094.

It is not an unprimeable number, because it can be changed into a prime (49015973) 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, 25176 + ... + 27052.

It is an arithmetic number, because the mean of its divisors is an integer number (5019894).

Almost surely, 2^49015978 is an apocalyptic number.

49015978 is a deficient number, since it is larger than the sum of its proper divisors (31302326).

49015978 is a wasteful number, since it uses less digits than its factorization.

49015978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 49015978 is about 7001.1411926914. The cubic root of 49015978 is about 365.9703410925.

The spelling of 49015978 in words is "forty-nine million, fifteen thousand, nine hundred seventy-eight".