28973400 has 96 divisors (see below), whose sum is σ = 91988160. Its totient is φ = 7539840.

The previous prime is 28973393. The next prime is 28973411. The reversal of 28973400 is 437982.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25239 + ... + 26361.

It is an arithmetic number, because the mean of its divisors is an integer number (958210).

Almost surely, 2^28973400 is an apocalyptic number.

28973400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28973400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45994080).

28973400 is an abundant number, since it is smaller than the sum of its proper divisors (63014760).

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

28973400 is a wasteful number, since it uses less digits than its factorization.

28973400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1176 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 28973400 is about 5382.6944925381. The cubic root of 28973400 is about 307.1377186294.

The spelling of 28973400 in words is "twenty-eight million, nine hundred seventy-three thousand, four hundred".