402013642 has 32 divisors (see below), whose sum is σ = 654188544. Its totient is φ = 184734000.

The previous prime is 402013627. The next prime is 402013649. The reversal of 402013642 is 246310204.

It is a happy number.

It is a super-2 number, since 2×402013642² = 323229936708208328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402013649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214393 + ... + 216259.

It is an arithmetic number, because the mean of its divisors is an integer number (20443392).

Almost surely, 2^402013642 is an apocalyptic number.

402013642 is a deficient number, since it is larger than the sum of its proper divisors (252174902).

402013642 is a wasteful number, since it uses less digits than its factorization.

402013642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 402013642 is about 20050.2778534363. The cubic root of 402013642 is about 738.0406175700.

Adding to 402013642 its reverse (246310204), we get a palindrome (648323846).

The spelling of 402013642 in words is "four hundred two million, thirteen thousand, six hundred forty-two".