57047340 has 96 divisors (see below), whose sum is σ = 187536384. Its totient is φ = 12683520.

The previous prime is 57047297. The next prime is 57047357. The reversal of 57047340 is 4374075.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 57047298 and 57047307.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13705 + ... + 17375.

It is an arithmetic number, because the mean of its divisors is an integer number (1953504).

Almost surely, 2^57047340 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 57047340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93768192).

57047340 is an abundant number, since it is smaller than the sum of its proper divisors (130489044).

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

57047340 is a wasteful number, since it uses less digits than its factorization.

57047340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727 (or 3725 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 57047340 is about 7552.9689526702. The cubic root of 57047340 is about 384.9566263613.

The spelling of 57047340 in words is "fifty-seven million, forty-seven thousand, three hundred forty".