28774414431 has 64 divisors (see below), whose sum is σ = 50889738240. Its totient is φ = 15711252480.

The previous prime is 28774414391. The next prime is 28774414483. The reversal of 28774414431 is 13441447782.

It is not a de Polignac number, because 28774414431 - 2⁶ = 28774414367 is a prime.

It is a super-2 number, since 2×28774414431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28774419431) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5009221 + ... + 5014961.

It is an arithmetic number, because the mean of its divisors is an integer number (795152160).

Almost surely, 2^28774414431 is an apocalyptic number.

28774414431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28774414431 is a deficient number, since it is larger than the sum of its proper divisors (22115323809).

28774414431 is a wasteful number, since it uses less digits than its factorization.

28774414431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6933 (or 6927 counting only the distinct ones).

The product of its digits is 602112, while the sum is 45.

The spelling of 28774414431 in words is "twenty-eight billion, seven hundred seventy-four million, four hundred fourteen thousand, four hundred thirty-one".