57122340 has 192 divisors, whose sum is σ = 188116992. Its totient is φ = 12812800.

The previous prime is 57122327. The next prime is 57122357. The reversal of 57122340 is 4322175.

It is a self number, because there is not a number n which added to its sum of digits gives 57122340.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 804505 + ... + 804575.

It is an arithmetic number, because the mean of its divisors is an integer number (979776).

Almost surely, 2^57122340 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 57122340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94058496).

57122340 is an abundant number, since it is smaller than the sum of its proper divisors (130994652).

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

57122340 is a wasteful number, since it uses less digits than its factorization.

57122340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 57122340 is about 7557.9322569073. The cubic root of 57122340 is about 385.1252530006.

The spelling of 57122340 in words is "fifty-seven million, one hundred twenty-two thousand, three hundred forty".