402421332 has 48 divisors (see below), whose sum is σ = 969857280. Its totient is φ = 129795072.

The previous prime is 402421321. The next prime is 402421337. The reversal of 402421332 is 233124204.

It is a junction number, because it is equal to n+sod(n) for n = 402421299 and 402421308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402421337) 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, 46188 + ... + 54204.

It is an arithmetic number, because the mean of its divisors is an integer number (20205360).

Almost surely, 2^402421332 is an apocalyptic number.

It is an amenable number.

402421332 is an abundant number, since it is smaller than the sum of its proper divisors (567435948).

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

402421332 is a wasteful number, since it uses less digits than its factorization.

402421332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8160 (or 8158 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 402421332 is about 20060.4419692090. The cubic root of 402421332 is about 738.2900204855.

Adding to 402421332 its reverse (233124204), we get a palindrome (635545536).

It can be divided in two parts, 402421 and 332, that added together give a triangular number (402753 = T₈₉₇).

The spelling of 402421332 in words is "four hundred two million, four hundred twenty-one thousand, three hundred thirty-two".