57004220 has 48 divisors (see below), whose sum is σ = 147338688. Its totient is φ = 18040320.

The previous prime is 57004219. The next prime is 57004223. The reversal of 57004220 is 2240075.

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 = 57004192 and 57004201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57004223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13841 + ... + 17480.

It is an arithmetic number, because the mean of its divisors is an integer number (3069556).

Almost surely, 2^57004220 is an apocalyptic number.

It is an amenable number.

57004220 is an abundant number, since it is smaller than the sum of its proper divisors (90334468).

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

57004220 is a wasteful number, since it uses less digits than its factorization.

57004220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31350 (or 31348 counting only the distinct ones).

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

The square root of 57004220 is about 7550.1139064255. The cubic root of 57004220 is about 384.8596103639.

Adding to 57004220 its reverse (2240075), we get a palindrome (59244295).

The spelling of 57004220 in words is "fifty-seven million, four thousand, two hundred twenty".