402781874 has 32 divisors (see below), whose sum is σ = 706916160. Its totient is φ = 170164800.

The previous prime is 402781843. The next prime is 402781877. The reversal of 402781874 is 478187204.

It is a happy number.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (402781877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13064 + ... + 31244.

It is an arithmetic number, because the mean of its divisors is an integer number (22091130).

Almost surely, 2^402781874 is an apocalyptic number.

402781874 is a deficient number, since it is larger than the sum of its proper divisors (304134286).

402781874 is a wasteful number, since it uses less digits than its factorization.

402781874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18266.

The product of its (nonzero) digits is 100352, while the sum is 41.

The square root of 402781874 is about 20069.4263495497. The cubic root of 402781874 is about 738.5104404654.

The spelling of 402781874 in words is "four hundred two million, seven hundred eighty-one thousand, eight hundred seventy-four".