49390778 has 8 divisors (see below), whose sum is σ = 75101268. Its totient is φ = 24357024.

The previous prime is 49390777. The next prime is 49390801. The reversal of 49390778 is 87709394.

It can be written as a sum of positive squares in 2 ways, for example, as 48260809 + 1129969 = 6947^2 + 1063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (49390777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169001 + ... + 169292.

Almost surely, 2^49390778 is an apocalyptic number.

49390778 is a deficient number, since it is larger than the sum of its proper divisors (25710490).

49390778 is a wasteful number, since it uses less digits than its factorization.

49390778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338368.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 49390778 is about 7027.8572836961. The cubic root of 49390778 is about 366.9007693272.

The spelling of 49390778 in words is "forty-nine million, three hundred ninety thousand, seven hundred seventy-eight".