28404488 has 32 divisors (see below), whose sum is σ = 61905600. Its totient is φ = 11965632.

The previous prime is 28404479. The next prime is 28404491. The reversal of 28404488 is 88440482.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995 + ... + 7602.

It is an arithmetic number, because the mean of its divisors is an integer number (1934550).

Almost surely, 2^28404488 is an apocalyptic number.

28404488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28404488 is an abundant number, since it is smaller than the sum of its proper divisors (33501112).

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

28404488 is a wasteful number, since it uses less digits than its factorization.

28404488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8669 (or 8665 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 38.

The square root of 28404488 is about 5329.5861002521. The cubic root of 28404488 is about 305.1141308962.

The spelling of 28404488 in words is "twenty-eight million, four hundred four thousand, four hundred eighty-eight".