57667428 has 144 divisors (see below), whose sum is σ = 185902080. Its totient is φ = 14660352.

The previous prime is 57667427. The next prime is 57667447. The reversal of 57667428 is 82476675.

57667428 is a `hidden beast` number, since 576 + 6 + 74 + 2 + 8 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (57667427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94701 + ... + 95307.

Almost surely, 2^57667428 is an apocalyptic number.

57667428 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57667428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92951040).

57667428 is an abundant number, since it is smaller than the sum of its proper divisors (128234652).

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

57667428 is a wasteful number, since it uses less digits than its factorization.

57667428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 661 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 57667428 is about 7593.9072946672. The cubic root of 57667428 is about 386.3463918788.

The spelling of 57667428 in words is "fifty-seven million, six hundred sixty-seven thousand, four hundred twenty-eight".