402664446 has 40 divisors (see below), whose sum is σ = 903782880. Its totient is φ = 133996032.

The previous prime is 402664441. The next prime is 402664459. The reversal of 402664446 is 644466204.

It is a happy number.

402664446 is a `hidden beast` number, since 4 + 0 + 2 + 6 + 644 + 4 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 402664446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402664441) 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 19 ways as a sum of consecutive naturals, for example, 114750 + ... + 118206.

It is an arithmetic number, because the mean of its divisors is an integer number (22594572).

Almost surely, 2^402664446 is an apocalyptic number.

402664446 is an abundant number, since it is smaller than the sum of its proper divisors (501118434).

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

402664446 is a wasteful number, since it uses less digits than its factorization.

402664446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4190 (or 4181 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The square root of 402664446 is about 20066.5005917823. The cubic root of 402664446 is about 738.4386644507.

The spelling of 402664446 in words is "four hundred two million, six hundred sixty-four thousand, four hundred forty-six".