28704951 has 36 divisors (see below), whose sum is σ = 46710664. Its totient is φ = 16964640.

The previous prime is 28704947. The next prime is 28704979. The reversal of 28704951 is 15940782.

It is not a de Polignac number, because 28704951 - 2² = 28704947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28704911) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 46521 + ... + 47133.

Almost surely, 2^28704951 is an apocalyptic number.

28704951 is a deficient number, since it is larger than the sum of its proper divisors (18005713).

28704951 is a wasteful number, since it uses less digits than its factorization.

28704951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 28704951 is about 5357.7001595834. The cubic root of 28704951 is about 306.1861932319.

The spelling of 28704951 in words is "twenty-eight million, seven hundred four thousand, nine hundred fifty-one".