28631951 has 2 divisors, whose sum is σ = 28631952. Its totient is φ = 28631950.

The previous prime is 28631947. The next prime is 28631971. The reversal of 28631951 is 15913682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28631951 - 2² = 28631947 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28631971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14315975 + 14315976.

It is an arithmetic number, because the mean of its divisors is an integer number (14315976).

Almost surely, 2^28631951 is an apocalyptic number.

28631951 is a deficient number, since it is larger than the sum of its proper divisors (1).

28631951 is an equidigital number, since it uses as much as digits as its factorization.

28631951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 28631951 is about 5350.8831981272. The cubic root of 28631951 is about 305.9264172966.

The spelling of 28631951 in words is "twenty-eight million, six hundred thirty-one thousand, nine hundred fifty-one".