49991964 has 96 divisors (see below), whose sum is σ = 138485760. Its totient is φ = 13867200.

The previous prime is 49991927. The next prime is 49991993. The reversal of 49991964 is 46919994.

It is a congruent number.

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, 77427 + ... + 78069.

It is an arithmetic number, because the mean of its divisors is an integer number (1442560).

Almost surely, 2^49991964 is an apocalyptic number.

49991964 is a gapful number since it is divisible by the number (44) 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 49991964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69242880).

49991964 is an abundant number, since it is smaller than the sum of its proper divisors (88493796).

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

49991964 is a wasteful number, since it uses less digits than its factorization.

49991964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711 (or 709 counting only the distinct ones).

The product of its digits is 629856, while the sum is 51.

The square root of 49991964 is about 7070.4995580228. The cubic root of 49991964 is about 368.3834122218.

The spelling of 49991964 in words is "forty-nine million, nine hundred ninety-one thousand, nine hundred sixty-four".