49278440 has 16 divisors (see below), whose sum is σ = 110876580. Its totient is φ = 19711360.

The previous prime is 49278421. The next prime is 49278469. The reversal of 49278440 is 4487294.

It can be written as a sum of positive squares in 2 ways, for example, as 48916036 + 362404 = 6994^2 + 602^2 .

It is a junction number, because it is equal to n+sod(n) for n = 49278394 and 49278403.

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, 615941 + ... + 616020.

Almost surely, 2^49278440 is an apocalyptic number.

49278440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49278440 is an abundant number, since it is smaller than the sum of its proper divisors (61598140).

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

49278440 is a wasteful number, since it uses less digits than its factorization.

49278440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231972 (or 1231968 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 49278440 is about 7019.8603974723. The cubic root of 49278440 is about 366.6223895112.

The spelling of 49278440 in words is "forty-nine million, two hundred seventy-eight thousand, four hundred forty".