57078420 has 96 divisors (see below), whose sum is σ = 187638528. Its totient is φ = 12690432.

The previous prime is 57078419. The next prime is 57078421. The reversal of 57078420 is 2487075.

It is an interprime number because it is at equal distance from previous prime (57078419) and next prime (57078421).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57078421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13704 + ... + 17376.

It is an arithmetic number, because the mean of its divisors is an integer number (1954568).

Almost surely, 2^57078420 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 57078420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93819264).

57078420 is an abundant number, since it is smaller than the sum of its proper divisors (130560108).

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

57078420 is a wasteful number, since it uses less digits than its factorization.

57078420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729 (or 3727 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 57078420 is about 7555.0261415828. The cubic root of 57078420 is about 385.0265231629.

The spelling of 57078420 in words is "fifty-seven million, seventy-eight thousand, four hundred twenty".