28901404 has 12 divisors (see below), whose sum is σ = 57802864. Its totient is φ = 12386304.

The previous prime is 28901399. The next prime is 28901417. The reversal of 28901404 is 40410982.

28901404 is an admirable number.

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 a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 1032193 = 28901404 / (2 + 8 + 9 + 0 + 1 + 4 + 0 + 4).

It is a congruent number.

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, 516069 + ... + 516124.

Almost surely, 2^28901404 is an apocalyptic number.

It is an amenable number.

28901404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28901404 is a wasteful number, since it uses less digits than its factorization.

28901404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032204 (or 1032202 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 28901404 is about 5376.0026041660. The cubic root of 28901404 is about 306.8831054503.

Subtracting from 28901404 its sum of digits (28), we obtain a square (28901376 = 5376²).

The spelling of 28901404 in words is "twenty-eight million, nine hundred one thousand, four hundred four".