402426660 has 24 divisors (see below), whose sum is σ = 1126794816. Its totient is φ = 107313760.

The previous prime is 402426623. The next prime is 402426667. The reversal of 402426660 is 66624204.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (402426667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3353496 + ... + 3353615.

It is an arithmetic number, because the mean of its divisors is an integer number (46949784).

Almost surely, 2^402426660 is an apocalyptic number.

It is an amenable number.

402426660 is an abundant number, since it is smaller than the sum of its proper divisors (724368156).

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

402426660 is a wasteful number, since it uses less digits than its factorization.

402426660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707123 (or 6707121 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 402426660 is about 20060.5747674387. The cubic root of 402426660 is about 738.2932787553.

The spelling of 402426660 in words is "four hundred two million, four hundred twenty-six thousand, six hundred sixty".