28031964 has 12 divisors (see below), whose sum is σ = 65407944. Its totient is φ = 9343984.

The previous prime is 28031959. The next prime is 28031989. The reversal of 28031964 is 46913082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1167987 + ... + 1168010.

It is an arithmetic number, because the mean of its divisors is an integer number (5450662).

Almost surely, 2^28031964 is an apocalyptic number.

It is an amenable number.

28031964 is an abundant number, since it is smaller than the sum of its proper divisors (37375980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28031964 is a wasteful number, since it uses less digits than its factorization.

28031964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336004 (or 2336002 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28031964 is about 5294.5220747486. The cubic root of 28031964 is about 303.7744026865.

The spelling of 28031964 in words is "twenty-eight million, thirty-one thousand, nine hundred sixty-four".