28053234531 has 48 divisors (see below), whose sum is σ = 47070609664. Its totient is φ = 15767877312.

The previous prime is 28053234523. The next prime is 28053234563. The reversal of 28053234531 is 13543235082.

28053234531 is a `hidden beast` number, since 2 + 80 + 532 + 3 + 45 + 3 + 1 = 666.

It is not a de Polignac number, because 28053234531 - 2³ = 28053234523 is a prime.

It is a super-2 number, since 2×28053234531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28053234511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3089460 + ... + 3098526.

Almost surely, 2^28053234531 is an apocalyptic number.

28053234531 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28053234531 is a deficient number, since it is larger than the sum of its proper divisors (19017375133).

28053234531 is a wasteful number, since it uses less digits than its factorization.

28053234531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9880 (or 9877 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 28053234531 in words is "twenty-eight billion, fifty-three million, two hundred thirty-four thousand, five hundred thirty-one".