49178778 has 16 divisors (see below), whose sum is σ = 107299296. Its totient is φ = 14902640.

The previous prime is 49178771. The next prime is 49178797. The reversal of 49178778 is 87787194.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 49178778.

It is not an unprimeable number, because it can be changed into a prime (49178771) 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, 372501 + ... + 372632.

It is an arithmetic number, because the mean of its divisors is an integer number (6706206).

Almost surely, 2^49178778 is an apocalyptic number.

49178778 is an abundant number, since it is smaller than the sum of its proper divisors (58120518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49178778 is a wasteful number, since it uses less digits than its factorization.

49178778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745149.

The product of its digits is 790272, while the sum is 51.

The square root of 49178778 is about 7012.7582305395. The cubic root of 49178778 is about 366.3750671506.

It can be divided in two parts, 4917 and 8778, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 49178778 in words is "forty-nine million, one hundred seventy-eight thousand, seven hundred seventy-eight".