28997444 has 24 divisors (see below), whose sum is σ = 61407360. Its totient is φ = 11696256.

The previous prime is 28997417. The next prime is 28997453. The reversal of 28997444 is 44479982.

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, 29984 + ... + 30935.

It is an arithmetic number, because the mean of its divisors is an integer number (2558640).

Almost surely, 2^28997444 is an apocalyptic number.

It is an amenable number.

28997444 is an abundant number, since it is smaller than the sum of its proper divisors (32409916).

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

28997444 is a wasteful number, since it uses less digits than its factorization.

28997444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60947 (or 60945 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 28997444 is about 5384.9274832629. The cubic root of 28997444 is about 307.2226560484. Note that the first 3 decimals are identical.

The spelling of 28997444 in words is "twenty-eight million, nine hundred ninety-seven thousand, four hundred forty-four".