402668420 has 96 divisors (see below), whose sum is σ = 1058593536. Its totient is φ = 124992000.

The previous prime is 402668417. The next prime is 402668423. The reversal of 402668420 is 24866204.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (402668417) and next prime (402668423).

It is not an unprimeable number, because it can be changed into a prime (402668423) 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, 574070 + ... + 574770.

It is an arithmetic number, because the mean of its divisors is an integer number (11027016).

Almost surely, 2^402668420 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 402668420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529296768).

402668420 is an abundant number, since it is smaller than the sum of its proper divisors (655925116).

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

402668420 is a wasteful number, since it uses less digits than its factorization.

402668420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 402668420 is about 20066.5996122911. The cubic root of 402668420 is about 738.4410937237.

The spelling of 402668420 in words is "four hundred two million, six hundred sixty-eight thousand, four hundred twenty".