402620166 has 64 divisors (see below), whose sum is σ = 996811200. Its totient is φ = 119605248.

The previous prime is 402620111. The next prime is 402620177. The reversal of 402620166 is 661026204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10470 + ... + 30246.

It is an arithmetic number, because the mean of its divisors is an integer number (15575175).

Almost surely, 2^402620166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402620166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498405600).

402620166 is an abundant number, since it is smaller than the sum of its proper divisors (594191034).

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

402620166 is a wasteful number, since it uses less digits than its factorization.

402620166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19830 (or 19824 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 402620166 is about 20065.3972300575. The cubic root of 402620166 is about 738.4115953754.

The spelling of 402620166 in words is "four hundred two million, six hundred twenty thousand, one hundred sixty-six".