57030402 has 48 divisors (see below), whose sum is σ = 134764128. Its totient is φ = 15949440.

The previous prime is 57030397. The next prime is 57030437. The reversal of 57030402 is 20403075.

It is a happy number.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8598 + ... + 13710.

It is an arithmetic number, because the mean of its divisors is an integer number (2807586).

Almost surely, 2^57030402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57030402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67382064).

57030402 is an abundant number, since it is smaller than the sum of its proper divisors (77733726).

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

57030402 is a wasteful number, since it uses less digits than its factorization.

57030402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155 (or 5142 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 57030402 is about 7551.8475885044. The cubic root of 57030402 is about 384.9185232656.

Adding to 57030402 its reverse (20403075), we get a palindrome (77433477).

The spelling of 57030402 in words is "fifty-seven million, thirty thousand, four hundred two".