28430972 has 12 divisors (see below), whose sum is σ = 49875336. Its totient is φ = 14180880.

The previous prime is 28430971. The next prime is 28430977. The reversal of 28430972 is 27903482.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28430971) 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, 6758 + ... + 10125.

It is an arithmetic number, because the mean of its divisors is an integer number (4156278).

Almost surely, 2^28430972 is an apocalyptic number.

It is an amenable number.

28430972 is a deficient number, since it is larger than the sum of its proper divisors (21444364).

28430972 is a wasteful number, since it uses less digits than its factorization.

28430972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17308 (or 17306 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 28430972 is about 5332.0701420743. The cubic root of 28430972 is about 305.2089296772.

The spelling of 28430972 in words is "twenty-eight million, four hundred thirty thousand, nine hundred seventy-two".