28989404 has 6 divisors (see below), whose sum is σ = 50731464. Its totient is φ = 14494700.

The previous prime is 28989397. The next prime is 28989409. The reversal of 28989404 is 40498982.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28989409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3623672 + ... + 3623679.

It is an arithmetic number, because the mean of its divisors is an integer number (8455244).

Almost surely, 2^28989404 is an apocalyptic number.

It is an amenable number.

28989404 is a deficient number, since it is larger than the sum of its proper divisors (21742060).

28989404 is a wasteful number, since it uses less digits than its factorization.

28989404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7247355 (or 7247353 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 28989404 is about 5384.1809033501. The cubic root of 28989404 is about 307.1942593102.

The spelling of 28989404 in words is "twenty-eight million, nine hundred eighty-nine thousand, four hundred four".