28351432 has 16 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 14158800.

The previous prime is 28351417. The next prime is 28351457. The reversal of 28351432 is 23415382.

It is a self number, because there is not a number n which added to its sum of digits gives 28351432.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7669 + ... + 10747.

It is an arithmetic number, because the mean of its divisors is an integer number (3326400).

Almost surely, 2^28351432 is an apocalyptic number.

It is an amenable number.

28351432 is a deficient number, since it is larger than the sum of its proper divisors (24870968).

28351432 is a wasteful number, since it uses less digits than its factorization.

28351432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4236 (or 4232 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 28351432 is about 5324.6062765241. The cubic root of 28351432 is about 304.9240409248.

It can be divided in two parts, 283 and 51432, that added together give a palindrome (51715).

The spelling of 28351432 in words is "twenty-eight million, three hundred fifty-one thousand, four hundred thirty-two".