28032764 has 6 divisors (see below), whose sum is σ = 49057344. Its totient is φ = 14016380.

The previous prime is 28032761. The next prime is 28032769. The reversal of 28032764 is 46723082.

It is a self number, because there is not a number n which added to its sum of digits gives 28032764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28032761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3504092 + ... + 3504099.

It is an arithmetic number, because the mean of its divisors is an integer number (8176224).

Almost surely, 2^28032764 is an apocalyptic number.

It is an amenable number.

28032764 is a deficient number, since it is larger than the sum of its proper divisors (21024580).

28032764 is a wasteful number, since it uses less digits than its factorization.

28032764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7008195 (or 7008193 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 28032764 is about 5294.5976239937. The cubic root of 28032764 is about 303.7772924496. Note that the first 3 decimals are identical.

The spelling of 28032764 in words is "twenty-eight million, thirty-two thousand, seven hundred sixty-four".