28570464 has 108 divisors (see below), whose sum is σ = 88127676. Its totient is φ = 8775936.

The previous prime is 28570459. The next prime is 28570469. The reversal of 28570464 is 46407582.

28570464 is a `hidden beast` number, since 28 + 570 + 4 + 64 = 666.

It is an interprime number because it is at equal distance from previous prime (28570459) and next prime (28570469).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28570469) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 48379 + ... + 48965.

It is an arithmetic number, because the mean of its divisors is an integer number (815997).

Almost surely, 2^28570464 is an apocalyptic number.

28570464 is a gapful number since it is divisible by the number (24) 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 28570464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44063838).

28570464 is an abundant number, since it is smaller than the sum of its proper divisors (59557212).

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

28570464 is a wasteful number, since it uses less digits than its factorization.

28570464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 28570464 is about 5345.1346100917. The cubic root of 28570464 is about 305.7072684297.

The spelling of 28570464 in words is "twenty-eight million, five hundred seventy thousand, four hundred sixty-four".