49317640 has 16 divisors (see below), whose sum is σ = 110964780. Its totient is φ = 19727040.

The previous prime is 49317637. The next prime is 49317649. The reversal of 49317640 is 4671394.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45131524 + 4186116 = 6718^2 + 2046^2 .

It is a junction number, because it is equal to n+sod(n) for n = 49317596 and 49317605.

It is not an unprimeable number, because it can be changed into a prime (49317649) 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, 616431 + ... + 616510.

Almost surely, 2^49317640 is an apocalyptic number.

49317640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49317640 is an abundant number, since it is smaller than the sum of its proper divisors (61647140).

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

49317640 is a wasteful number, since it uses less digits than its factorization.

49317640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232952 (or 1232948 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 49317640 is about 7022.6519207490. The cubic root of 49317640 is about 366.7195773048.

The spelling of 49317640 in words is "forty-nine million, three hundred seventeen thousand, six hundred forty".