28585404 has 18 divisors (see below), whose sum is σ = 72257640. Its totient is φ = 9528456.

The previous prime is 28585399. The next prime is 28585409. The reversal of 28585404 is 40458582.

It is an interprime number because it is at equal distance from previous prime (28585399) and next prime (28585409).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 794039 = 28585404 / (2 + 8 + 5 + 8 + 5 + 4 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28585409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 396984 + ... + 397055.

Almost surely, 2^28585404 is an apocalyptic number.

It is an amenable number.

28585404 is an abundant number, since it is smaller than the sum of its proper divisors (43672236).

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

28585404 is a wasteful number, since it uses less digits than its factorization.

28585404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794049 (or 794044 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 28585404 is about 5346.5319600653. The cubic root of 28585404 is about 305.7605457200.

The spelling of 28585404 in words is "twenty-eight million, five hundred eighty-five thousand, four hundred four".