49857399 has 24 divisors (see below), whose sum is σ = 75883392. Its totient is φ = 31482000.

The previous prime is 49857377. The next prime is 49857403. The reversal of 49857399 is 99375894.

It is not a de Polignac number, because 49857399 - 2²⁵ = 16302967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49857319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21024 + ... + 23274.

It is an arithmetic number, because the mean of its divisors is an integer number (3161808).

Almost surely, 2^49857399 is an apocalyptic number.

49857399 is a deficient number, since it is larger than the sum of its proper divisors (26025993).

49857399 is a wasteful number, since it uses less digits than its factorization.

49857399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387 (or 2384 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 49857399 is about 7060.9771986603. The cubic root of 49857399 is about 368.0525853297.

The spelling of 49857399 in words is "forty-nine million, eight hundred fifty-seven thousand, three hundred ninety-nine".