28967908431 has 32 divisors (see below), whose sum is σ = 48163124736. Its totient is φ = 15045552000.

The previous prime is 28967908379. The next prime is 28967908471. The reversal of 28967908431 is 13480976982.

It is not a de Polignac number, because 28967908431 - 2⁷ = 28967908303 is a prime.

It is a super-5 number, since 5×28967908431⁵ (a number of 54 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28967908471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2253001 + ... + 2265821.

It is an arithmetic number, because the mean of its divisors is an integer number (1505097648).

Almost surely, 2^28967908431 is an apocalyptic number.

28967908431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28967908431 is a deficient number, since it is larger than the sum of its proper divisors (19195216305).

28967908431 is a wasteful number, since it uses less digits than its factorization.

28967908431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22623.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 28967908431 in words is "twenty-eight billion, nine hundred sixty-seven million, nine hundred eight thousand, four hundred thirty-one".