28700451 has 48 divisors (see below), whose sum is σ = 47453952. Its totient is φ = 16588800.

The previous prime is 28700447. The next prime is 28700467. The reversal of 28700451 is 15400782.

It is not a de Polignac number, because 28700451 - 2² = 28700447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28700411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148611 + ... + 148803.

It is an arithmetic number, because the mean of its divisors is an integer number (988624).

Almost surely, 2^28700451 is an apocalyptic number.

28700451 is a deficient number, since it is larger than the sum of its proper divisors (18753501).

28700451 is a wasteful number, since it uses less digits than its factorization.

28700451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28700451 is about 5357.2801868112. The cubic root of 28700451 is about 306.1701923932.

The spelling of 28700451 in words is "twenty-eight million, seven hundred thousand, four hundred fifty-one".