402226992 has 80 divisors (see below), whose sum is σ = 1156934880. Its totient is φ = 133797888.

The previous prime is 402226973. The next prime is 402226997. The reversal of 402226992 is 299622204.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (402226997) 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, 411208 + ... + 412184.

It is an arithmetic number, because the mean of its divisors is an integer number (14461686).

Almost surely, 2^402226992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402226992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578467440).

402226992 is an abundant number, since it is smaller than the sum of its proper divisors (754707888).

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

402226992 is a wasteful number, since it uses less digits than its factorization.

402226992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947 (or 1935 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 402226992 is about 20055.5975228862. The cubic root of 402226992 is about 738.1711546981.

The spelling of 402226992 in words is "four hundred two million, two hundred twenty-six thousand, nine hundred ninety-two".