28931364 has 192 divisors, whose sum is σ = 96768000. Its totient is φ = 7408800.

The previous prime is 28931347. The next prime is 28931369. The reversal of 28931364 is 46313982.

28931364 is a `hidden beast` number, since 289 + 313 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28931369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 407449 + ... + 407519.

It is an arithmetic number, because the mean of its divisors is an integer number (504000).

Almost surely, 2^28931364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28931364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48384000).

28931364 is an abundant number, since it is smaller than the sum of its proper divisors (67836636).

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

28931364 is a wasteful number, since it uses less digits than its factorization.

28931364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 94 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 28931364 is about 5378.7883393939. The cubic root of 28931364 is about 306.9891100198.

The spelling of 28931364 in words is "twenty-eight million, nine hundred thirty-one thousand, three hundred sixty-four".