28054931 has 2 divisors, whose sum is σ = 28054932. Its totient is φ = 28054930.

The previous prime is 28054927. The next prime is 28054951. The reversal of 28054931 is 13945082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28054931 - 2² = 28054927 is a prime.

It is a super-2 number, since 2×28054931² = 1574158306829522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28054921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14027465 + 14027466.

It is an arithmetic number, because the mean of its divisors is an integer number (14027466).

Almost surely, 2^28054931 is an apocalyptic number.

28054931 is a deficient number, since it is larger than the sum of its proper divisors (1).

28054931 is an equidigital number, since it uses as much as digits as its factorization.

28054931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 28054931 is about 5296.6905705355. The cubic root of 28054931 is about 303.8573423166.

The spelling of 28054931 in words is "twenty-eight million, fifty-four thousand, nine hundred thirty-one".