402064340 has 24 divisors (see below), whose sum is σ = 845004552. Its totient is φ = 160698240.

The previous prime is 402064277. The next prime is 402064349. The reversal of 402064340 is 43460204.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5098564 + 396965776 = 2258^2 + 19924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402064349) 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 7 ways as a sum of consecutive naturals, for example, 20342 + ... + 34898.

It is an arithmetic number, because the mean of its divisors is an integer number (35208523).

Almost surely, 2^402064340 is an apocalyptic number.

It is an amenable number.

402064340 is an abundant number, since it is smaller than the sum of its proper divisors (442940212).

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

402064340 is a wasteful number, since it uses less digits than its factorization.

402064340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15947 (or 15945 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 402064340 is about 20051.5420853360. The cubic root of 402064340 is about 738.0716410698.

The spelling of 402064340 in words is "four hundred two million, sixty-four thousand, three hundred forty".