28526631 has 8 divisors (see below), whose sum is σ = 43469184. Its totient is φ = 16300920.

The previous prime is 28526627. The next prime is 28526653. The reversal of 28526631 is 13662582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28526631 - 2² = 28526627 is a prime.

It is a super-2 number, since 2×28526631² = 1627537352420322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28526592 and 28526601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28526621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679185 + ... + 679226.

It is an arithmetic number, because the mean of its divisors is an integer number (5433648).

Almost surely, 2^28526631 is an apocalyptic number.

28526631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28526631 is a deficient number, since it is larger than the sum of its proper divisors (14942553).

28526631 is a wasteful number, since it uses less digits than its factorization.

28526631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358421.

The product of its digits is 17280, while the sum is 33.

The square root of 28526631 is about 5341.0327652992. The cubic root of 28526631 is about 305.5508490196.

The spelling of 28526631 in words is "twenty-eight million, five hundred twenty-six thousand, six hundred thirty-one".