402421032 has 48 divisors (see below), whose sum is σ = 1173730740. Its totient is φ = 123821568.

The previous prime is 402421031. The next prime is 402421049. The reversal of 402421032 is 230124204.

It can be written as a sum of positive squares in 2 ways, for example, as 377680356 + 24740676 = 19434^2 + 4974^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 402420996 and 402421014.

It is not an unprimeable number, because it can be changed into a prime (402421031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214033 + ... + 215904.

Almost surely, 2^402421032 is an apocalyptic number.

It is an amenable number.

402421032 is an abundant number, since it is smaller than the sum of its proper divisors (771309708).

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

402421032 is a wasteful number, since it uses less digits than its factorization.

402421032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429962 (or 429955 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402421032 is about 20060.4344918050. The cubic root of 402421032 is about 738.2898370235.

Adding to 402421032 its reverse (230124204), we get a palindrome (632545236).

The spelling of 402421032 in words is "four hundred two million, four hundred twenty-one thousand, thirty-two".