28980131 has 2 divisors, whose sum is σ = 28980132. Its totient is φ = 28980130.

The previous prime is 28980109. The next prime is 28980137. The reversal of 28980131 is 13108982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28980131 - 2⁶ = 28980067 is a prime.

It is a super-2 number, since 2×28980131² = 1679695985554322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28980137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14490065 + 14490066.

It is an arithmetic number, because the mean of its divisors is an integer number (14490066).

Almost surely, 2^28980131 is an apocalyptic number.

28980131 is a deficient number, since it is larger than the sum of its proper divisors (1).

28980131 is an equidigital number, since it uses as much as digits as its factorization.

28980131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 28980131 is about 5383.3197007051. The cubic root of 28980131 is about 307.1615011784.

The spelling of 28980131 in words is "twenty-eight million, nine hundred eighty thousand, one hundred thirty-one".