402491196 has 36 divisors (see below), whose sum is σ = 1018017000. Its totient is φ = 134083488.

The previous prime is 402491189. The next prime is 402491207. The reversal of 402491196 is 691194204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 402491196.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 117070 + ... + 120458.

It is an arithmetic number, because the mean of its divisors is an integer number (28278250).

Almost surely, 2^402491196 is an apocalyptic number.

It is an amenable number.

402491196 is an abundant number, since it is smaller than the sum of its proper divisors (615525804).

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

402491196 is a wasteful number, since it uses less digits than its factorization.

402491196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6698 (or 6693 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 402491196 is about 20062.1832311441. The cubic root of 402491196 is about 738.3327426320.

The spelling of 402491196 in words is "four hundred two million, four hundred ninety-one thousand, one hundred ninety-six".