49638857 has 4 divisors (see below), whose sum is σ = 49654800. Its totient is φ = 49622916.

The previous prime is 49638851. The next prime is 49638859. The reversal of 49638857 is 75883694.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49638857 - 2⁸ = 49638601 is a prime.

It is a super-2 number, since 2×49638857² = 4928032248532898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49638851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1607 + ... + 10092.

It is an arithmetic number, because the mean of its divisors is an integer number (12413700).

Almost surely, 2^49638857 is an apocalyptic number.

It is an amenable number.

49638857 is a deficient number, since it is larger than the sum of its proper divisors (15943).

49638857 is a wasteful number, since it uses less digits than its factorization.

49638857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15942.

The product of its digits is 1451520, while the sum is 50.

The square root of 49638857 is about 7045.4848662104. The cubic root of 49638857 is about 367.5140309635.

The spelling of 49638857 in words is "forty-nine million, six hundred thirty-eight thousand, eight hundred fifty-seven".