57042020 has 48 divisors (see below), whose sum is σ = 139829760. Its totient is φ = 19138944.

The previous prime is 57042019. The next prime is 57042031. The reversal of 57042020 is 2024075.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 57041983 and 57042001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2246 + ... + 10914.

It is an arithmetic number, because the mean of its divisors is an integer number (2913120).

Almost surely, 2^57042020 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 57042020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69914880).

57042020 is an abundant number, since it is smaller than the sum of its proper divisors (82787740).

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

57042020 is a wasteful number, since it uses less digits than its factorization.

57042020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8732 (or 8730 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 57042020 is about 7552.6167650689. The cubic root of 57042020 is about 384.9446594994.

Adding to 57042020 its reverse (2024075), we get a palindrome (59066095).

The spelling of 57042020 in words is "fifty-seven million, forty-two thousand, twenty".