28661026 has 8 divisors (see below), whose sum is σ = 43474860. Its totient is φ = 14169408.

The previous prime is 28661021. The next prime is 28661027. The reversal of 28661026 is 62016682.

It can be written as a sum of positive squares in 2 ways, for example, as 22896225 + 5764801 = 4785^2 + 2401^2 .

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

It is a super-2 number, since 2×28661026² = 1642908822745352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28661021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80331 + ... + 80686.

Almost surely, 2^28661026 is an apocalyptic number.

28661026 is a deficient number, since it is larger than the sum of its proper divisors (14813834).

28661026 is a wasteful number, since it uses less digits than its factorization.

28661026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161108.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28661026 is about 5353.5993499701. The cubic root of 28661026 is about 306.0299356989.

The spelling of 28661026 in words is "twenty-eight million, six hundred sixty-one thousand, twenty-six".