28031464 has 8 divisors (see below), whose sum is σ = 52559010. Its totient is φ = 14015728.

The previous prime is 28031461. The next prime is 28031473. The reversal of 28031464 is 46413082.

It can be written as a sum of positive squares in only one way, i.e., 27144100 + 887364 = 5210^2 + 942^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) 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 (28031461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1751959 + ... + 1751974.

Almost surely, 2^28031464 is an apocalyptic number.

It is an amenable number.

28031464 is a deficient number, since it is larger than the sum of its proper divisors (24527546).

28031464 is a wasteful number, since it uses less digits than its factorization.

28031464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503939 (or 3503935 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28031464 is about 5294.4748559229. The cubic root of 28031464 is about 303.7725965566.

The spelling of 28031464 in words is "twenty-eight million, thirty-one thousand, four hundred sixty-four".