28915849400 has 24 divisors (see below), whose sum is σ = 67229350320. Its totient is φ = 11566339680.

The previous prime is 28915849399. The next prime is 28915849421. The reversal of 28915849400 is 494851982.

It is a super-2 number, since 2×28915849400² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72289424 + ... + 72289823.

It is an arithmetic number, because the mean of its divisors is an integer number (2801222930).

Almost surely, 2^28915849400 is an apocalyptic number.

28915849400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28915849400 is an abundant number, since it is smaller than the sum of its proper divisors (38313500920).

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

28915849400 is a wasteful number, since it uses less digits than its factorization.

28915849400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144579263 (or 144579254 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 28915849400 in words is "twenty-eight billion, nine hundred fifteen million, eight hundred forty-nine thousand, four hundred".