57021402 has 16 divisors (see below), whose sum is σ = 114131232. Its totient is φ = 18992400.

The previous prime is 57021389. The next prime is 57021407. The reversal of 57021402 is 20412075.

It is not an unprimeable number, because it can be changed into a prime (57021407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7152 + ... + 12852.

It is an arithmetic number, because the mean of its divisors is an integer number (7133202).

Almost surely, 2^57021402 is an apocalyptic number.

57021402 is an abundant number, since it is smaller than the sum of its proper divisors (57109830).

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

57021402 is a wasteful number, since it uses less digits than its factorization.

57021402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 57021402 is about 7551.2516843236. The cubic root of 57021402 is about 384.8982741304.

Adding to 57021402 its reverse (20412075), we get a palindrome (77433477).

The spelling of 57021402 in words is "fifty-seven million, twenty-one thousand, four hundred two".