402220266 has 64 divisors (see below), whose sum is σ = 964472832. Its totient is φ = 109415232.

The previous prime is 402220261. The next prime is 402220327. The reversal of 402220266 is 662022204.

It is a super-2 number, since 2×402220266² = 323562284762221512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402220261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70285 + ... + 75791.

It is an arithmetic number, because the mean of its divisors is an integer number (15069888).

Almost surely, 2^402220266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402220266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482236416).

402220266 is an abundant number, since it is smaller than the sum of its proper divisors (562252566).

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

402220266 is a wasteful number, since it uses less digits than its factorization.

402220266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5603.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 402220266 is about 20055.4298383256. The cubic root of 402220266 is about 738.1670401335.

The spelling of 402220266 in words is "four hundred two million, two hundred twenty thousand, two hundred sixty-six".