49990778 has 16 divisors (see below), whose sum is σ = 79600320. Its totient is φ = 23464896.

The previous prime is 49990771. The next prime is 49990783. The reversal of 49990778 is 87709994.

It is not an unprimeable number, because it can be changed into a prime (49990771) 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, 13403 + ... + 16721.

It is an arithmetic number, because the mean of its divisors is an integer number (4975020).

Almost surely, 2^49990778 is an apocalyptic number.

49990778 is a deficient number, since it is larger than the sum of its proper divisors (29609542).

49990778 is a wasteful number, since it uses less digits than its factorization.

49990778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 49990778 is about 7070.4156879210. The cubic root of 49990778 is about 368.3804990458.

The spelling of 49990778 in words is "forty-nine million, nine hundred ninety thousand, seven hundred seventy-eight".