402032020 has 96 divisors (see below), whose sum is σ = 968083200. Its totient is φ = 139014144.

The previous prime is 402032011. The next prime is 402032021. The reversal of 402032020 is 20230204.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402032021) 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, 478761 + ... + 479599.

It is an arithmetic number, because the mean of its divisors is an integer number (10084200).

Almost surely, 2^402032020 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 402032020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (484041600).

402032020 is an abundant number, since it is smaller than the sum of its proper divisors (566051180).

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

402032020 is a wasteful number, since it uses less digits than its factorization.

402032020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 402032020 is about 20050.7361460870. The cubic root of 402032020 is about 738.0518638747.

Adding to 402032020 its reverse (20230204), we get a palindrome (422262224).

The spelling of 402032020 in words is "four hundred two million, thirty-two thousand, twenty".