28949800 has 48 divisors (see below), whose sum is σ = 73432800. Its totient is φ = 10526400.

The previous prime is 28949779. The next prime is 28949857. The reversal of 28949800 is 894982.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4380 + ... + 8779.

It is an arithmetic number, because the mean of its divisors is an integer number (1529850).

Almost surely, 2^28949800 is an apocalyptic number.

28949800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28949800 is an abundant number, since it is smaller than the sum of its proper divisors (44483000).

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

28949800 is a wasteful number, since it uses less digits than its factorization.

28949800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13186 (or 13177 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 28949800 is about 5380.5018353310. The cubic root of 28949800 is about 307.0543039674.

The spelling of 28949800 in words is "twenty-eight million, nine hundred forty-nine thousand, eight hundred".