49951640 has 32 divisors (see below), whose sum is σ = 113287680. Its totient is φ = 19821312.

The previous prime is 49951639. The next prime is 49951669. The reversal of 49951640 is 4615994.

It is a junction number, because it is equal to n+sod(n) for n = 49951594 and 49951603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164 + ... + 9996.

It is an arithmetic number, because the mean of its divisors is an integer number (3540240).

Almost surely, 2^49951640 is an apocalyptic number.

49951640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49951640 is an abundant number, since it is smaller than the sum of its proper divisors (63336040).

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

49951640 is a wasteful number, since it uses less digits than its factorization.

49951640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9971 (or 9967 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 49951640 is about 7067.6474162199. The cubic root of 49951640 is about 368.2843383755.

The spelling of 49951640 in words is "forty-nine million, nine hundred fifty-one thousand, six hundred forty".