28431652 has 12 divisors (see below), whose sum is σ = 49810096. Its totient is φ = 14200200.

The previous prime is 28431649. The next prime is 28431659. The reversal of 28431652 is 25613482.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28431659) 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, 823 + ... + 7585.

Almost surely, 2^28431652 is an apocalyptic number.

It is an amenable number.

28431652 is a deficient number, since it is larger than the sum of its proper divisors (21378444).

28431652 is a wasteful number, since it uses less digits than its factorization.

28431652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7818 (or 7816 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 28431652 is about 5332.1339067957. The cubic root of 28431652 is about 305.2113629439.

The spelling of 28431652 in words is "twenty-eight million, four hundred thirty-one thousand, six hundred fifty-two".