49993640 has 16 divisors (see below), whose sum is σ = 112485780. Its totient is φ = 19997440.

The previous prime is 49993633. The next prime is 49993663. The reversal of 49993640 is 4639994.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40271716 + 9721924 = 6346^2 + 3118^2 .

It is a junction number, because it is equal to n+sod(n) for n = 49993591 and 49993600.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624881 + ... + 624960.

Almost surely, 2^49993640 is an apocalyptic number.

49993640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49993640 is an abundant number, since it is smaller than the sum of its proper divisors (62492140).

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

49993640 is a wasteful number, since it uses less digits than its factorization.

49993640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249852 (or 1249848 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 49993640 is about 7070.6180776506. The cubic root of 49993640 is about 368.3875289081.

The spelling of 49993640 in words is "forty-nine million, nine hundred ninety-three thousand, six hundred forty".