28431044 has 12 divisors (see below), whose sum is σ = 49796544. Its totient is φ = 14203464.

The previous prime is 28431031. The next prime is 28431071. The reversal of 28431044 is 44013482.

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, 4217 + ... + 8639.

It is an arithmetic number, because the mean of its divisors is an integer number (4149712).

Almost surely, 2^28431044 is an apocalyptic number.

It is an amenable number.

28431044 is a deficient number, since it is larger than the sum of its proper divisors (21365500).

28431044 is a wasteful number, since it uses less digits than its factorization.

28431044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6034 (or 6032 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 28431044 is about 5332.0768936691. The cubic root of 28431044 is about 305.2091873190.

The spelling of 28431044 in words is "twenty-eight million, four hundred thirty-one thousand, forty-four".