49238640 has 120 divisors (see below), whose sum is σ = 180421488. Its totient is φ = 11934720.

The previous prime is 49238621. The next prime is 49238669. The reversal of 49238640 is 4683294.

It is a happy number.

49238640 is a `hidden beast` number, since 4 + 9 + 2 + 3 + 8 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 49238595 and 49238604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4812 + ... + 11028.

Almost surely, 2^49238640 is an apocalyptic number.

49238640 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 49238640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90210744).

49238640 is an abundant number, since it is smaller than the sum of its proper divisors (131182848).

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

49238640 is a wasteful number, since it uses less digits than its factorization.

49238640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6247 (or 6238 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 49238640 is about 7017.0250106438. The cubic root of 49238640 is about 366.5236614049.

The spelling of 49238640 in words is "forty-nine million, two hundred thirty-eight thousand, six hundred forty".