28357056 has 168 divisors, whose sum is σ = 100222304. Its totient is φ = 7464960.

The previous prime is 28357019. The next prime is 28357057. The reversal of 28357056 is 65075382.

28357056 is a `hidden beast` number, since 2 + 83 + 570 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

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

It is a self number, because there is not a number n which added to its sum of digits gives 28357056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28357057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52146 + ... + 52686.

Almost surely, 2^28357056 is an apocalyptic number.

28357056 is a gapful number since it is divisible by the number (26) 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 28357056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50111152).

28357056 is an abundant number, since it is smaller than the sum of its proper divisors (71865248).

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

28357056 is a wasteful number, since it uses less digits than its factorization.

28357056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 28357056 is about 5325.1343645020. The cubic root of 28357056 is about 304.9442019220.

The spelling of 28357056 in words is "twenty-eight million, three hundred fifty-seven thousand, fifty-six".