57228402 has 48 divisors (see below), whose sum is σ = 143793216. Its totient is φ = 14863200.

The previous prime is 57228401. The next prime is 57228403. The reversal of 57228402 is 20482275.

It is an interprime number because it is at equal distance from previous prime (57228401) and next prime (57228403).

It is a self number, because there is not a number n which added to its sum of digits gives 57228402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57228401) 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, 549 + ... + 10712.

It is an arithmetic number, because the mean of its divisors is an integer number (2995692).

Almost surely, 2^57228402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57228402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71896608).

57228402 is an abundant number, since it is smaller than the sum of its proper divisors (86564814).

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

57228402 is a wasteful number, since it uses less digits than its factorization.

57228402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11295 (or 11284 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 57228402 is about 7564.9456045632. The cubic root of 57228402 is about 385.3634662789.

It can be divided in two parts, 57228 and 402, that added together give a triangular number (57630 = T₃₃₉).

The spelling of 57228402 in words is "fifty-seven million, two hundred twenty-eight thousand, four hundred two".