402246020 has 48 divisors (see below), whose sum is σ = 923203008. Its totient is φ = 146002560.

The previous prime is 402245999. The next prime is 402246023. The reversal of 402246020 is 20642204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 402245983 and 402246001.

It is not an unprimeable number, because it can be changed into a prime (402246023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148922 + ... + 151598.

It is an arithmetic number, because the mean of its divisors is an integer number (19233396).

Almost surely, 2^402246020 is an apocalyptic number.

It is an amenable number.

402246020 is an abundant number, since it is smaller than the sum of its proper divisors (520956988).

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

402246020 is a wasteful number, since it uses less digits than its factorization.

402246020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380 (or 3378 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 402246020 is about 20056.0718985548. The cubic root of 402246020 is about 738.1827946423.

Adding to 402246020 its reverse (20642204), we get a palindrome (422888224).

The spelling of 402246020 in words is "four hundred two million, two hundred forty-six thousand, twenty".