28840651 has 24 divisors (see below), whose sum is σ = 35442144. Its totient is φ = 22982400.

The previous prime is 28840631. The next prime is 28840661. The reversal of 28840651 is 15604882.

It is not a de Polignac number, because 28840651 - 2⁷ = 28840523 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28840601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255171 + ... + 255283.

It is an arithmetic number, because the mean of its divisors is an integer number (1476756).

Almost surely, 2^28840651 is an apocalyptic number.

28840651 is a deficient number, since it is larger than the sum of its proper divisors (6601493).

28840651 is a wasteful number, since it uses less digits than its factorization.

28840651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 28840651 is about 5370.3492437643. The cubic root of 28840651 is about 306.6679238816.

The spelling of 28840651 in words is "twenty-eight million, eight hundred forty thousand, six hundred fifty-one".