28999488 has 56 divisors (see below), whose sum is σ = 87692992. Its totient is φ = 8285184.

The previous prime is 28999447. The next prime is 28999489. The reversal of 28999488 is 88499982.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28999489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9445 + ... + 12132.

Almost surely, 2^28999488 is an apocalyptic number.

28999488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28999488 is an abundant number, since it is smaller than the sum of its proper divisors (58693504).

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

28999488 is a wasteful number, since it uses less digits than its factorization.

28999488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21599 (or 21589 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 57.

The square root of 28999488 is about 5385.1172689181. The cubic root of 28999488 is about 307.2298744818.

The spelling of 28999488 in words is "twenty-eight million, nine hundred ninety-nine thousand, four hundred eighty-eight".