28990396 has 24 divisors (see below), whose sum is σ = 53343360. Its totient is φ = 13759152.

The previous prime is 28990387. The next prime is 28990421. The reversal of 28990396 is 69309982.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11655 + ... + 13921.

It is an arithmetic number, because the mean of its divisors is an integer number (2222640).

Almost surely, 2^28990396 is an apocalyptic number.

It is an amenable number.

28990396 is a deficient number, since it is larger than the sum of its proper divisors (24352964).

28990396 is a wasteful number, since it uses less digits than its factorization.

28990396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433 (or 2431 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 28990396 is about 5384.2730242810. The cubic root of 28990396 is about 307.1977632713.

The spelling of 28990396 in words is "twenty-eight million, nine hundred ninety thousand, three hundred ninety-six".