49898640 has 160 divisors (see below), whose sum is σ = 173238912. Its totient is φ = 11776000.

The previous prime is 49898633. The next prime is 49898657. The reversal of 49898640 is 4689894.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 49898640.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108010 + ... + 108470.

Almost surely, 2^49898640 is an apocalyptic number.

49898640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49898640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86619456).

49898640 is an abundant number, since it is smaller than the sum of its proper divisors (123340272).

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

49898640 is a wasteful number, since it uses less digits than its factorization.

49898640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 49898640 is about 7063.8969414906. The cubic root of 49898640 is about 368.1540391673.

The spelling of 49898640 in words is "forty-nine million, eight hundred ninety-eight thousand, six hundred forty".