402432140 has 48 divisors (see below), whose sum is σ = 933085440. Its totient is φ = 144569280.

The previous prime is 402432119. The next prime is 402432161. The reversal of 402432140 is 41234204.

It is an interprime number because it is at equal distance from previous prime (402432119) and next prime (402432161).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7241 + ... + 29279.

It is an arithmetic number, because the mean of its divisors is an integer number (19439280).

Almost surely, 2^402432140 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 402432140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (466542720).

402432140 is an abundant number, since it is smaller than the sum of its proper divisors (530653300).

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

402432140 is a wasteful number, since it uses less digits than its factorization.

402432140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22142 (or 22140 counting only the distinct ones).

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

The square root of 402432140 is about 20060.7113532895. The cubic root of 402432140 is about 738.2966299488.

Adding to 402432140 its reverse (41234204), we get a palindrome (443666344).

The spelling of 402432140 in words is "four hundred two million, four hundred thirty-two thousand, one hundred forty".