49978431 has 16 divisors (see below), whose sum is σ = 74701920. Its totient is φ = 33022080.

The previous prime is 49978387. The next prime is 49978447. The reversal of 49978431 is 13487994.

It is not a de Polignac number, because 49978431 - 2¹⁸ = 49716287 is a prime.

It is a super-2 number, since 2×49978431² = 4995687130443522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49978451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5140 + ... + 11241.

It is an arithmetic number, because the mean of its divisors is an integer number (4668870).

Almost surely, 2^49978431 is an apocalyptic number.

49978431 is a deficient number, since it is larger than the sum of its proper divisors (24723489).

49978431 is a wasteful number, since it uses less digits than its factorization.

49978431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16503 (or 16497 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 49978431 is about 7069.5424887329. The cubic root of 49978431 is about 368.3501683280.

The spelling of 49978431 in words is "forty-nine million, nine hundred seventy-eight thousand, four hundred thirty-one".