28486631 has 2 divisors, whose sum is σ = 28486632. Its totient is φ = 28486630.

The previous prime is 28486589. The next prime is 28486657. The reversal of 28486631 is 13668482.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28486631 - 2²² = 24292327 is a prime.

It is a super-2 number, since 2×28486631² = 1622976291460322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28486231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14243315 + 14243316.

It is an arithmetic number, because the mean of its divisors is an integer number (14243316).

Almost surely, 2^28486631 is an apocalyptic number.

28486631 is a deficient number, since it is larger than the sum of its proper divisors (1).

28486631 is an equidigital number, since it uses as much as digits as its factorization.

28486631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 38.

The square root of 28486631 is about 5337.2868575710. The cubic root of 28486631 is about 305.4079678993.

The spelling of 28486631 in words is "twenty-eight million, four hundred eighty-six thousand, six hundred thirty-one".