402021464 has 16 divisors (see below), whose sum is σ = 811774320. Its totient is φ = 185548320.

The previous prime is 402021443. The next prime is 402021467. The reversal of 402021464 is 464120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402021467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1932692 + ... + 1932899.

It is an arithmetic number, because the mean of its divisors is an integer number (50735895).

Almost surely, 2^402021464 is an apocalyptic number.

It is an amenable number.

402021464 is an abundant number, since it is smaller than the sum of its proper divisors (409752856).

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

402021464 is a wasteful number, since it uses less digits than its factorization.

402021464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3865610 (or 3865606 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 402021464 is about 20050.4729121285. The cubic root of 402021464 is about 738.0454042369.

Adding to 402021464 its reverse (464120204), we get a palindrome (866141668).

The spelling of 402021464 in words is "four hundred two million, twenty-one thousand, four hundred sixty-four".