49649640 has 64 divisors (see below), whose sum is σ = 155433600. Its totient is φ = 12663552.

The previous prime is 49649627. The next prime is 49649651. The reversal of 49649640 is 4694694.

It is a junction number, because it is equal to n+sod(n) for n = 49649592 and 49649601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6235 + ... + 11754.

It is an arithmetic number, because the mean of its divisors is an integer number (2428650).

Almost surely, 2^49649640 is an apocalyptic number.

49649640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49649640 is an abundant number, since it is smaller than the sum of its proper divisors (105783960).

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

49649640 is a wasteful number, since it uses less digits than its factorization.

49649640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18026 (or 18022 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 49649640 is about 7046.2500665247. The cubic root of 49649640 is about 367.5406406071.

The spelling of 49649640 in words is "forty-nine million, six hundred forty-nine thousand, six hundred forty".