402324540 has 96 divisors (see below), whose sum is σ = 1185408000. Its totient is φ = 101805312.

The previous prime is 402324539. The next prime is 402324547. The reversal of 402324540 is 45423204.

It is a self number, because there is not a number n which added to its sum of digits gives 402324540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402324547) 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, 100701 + ... + 104619.

It is an arithmetic number, because the mean of its divisors is an integer number (12348000).

Almost surely, 2^402324540 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 402324540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592704000).

402324540 is an abundant number, since it is smaller than the sum of its proper divisors (783083460).

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

402324540 is a wasteful number, since it uses less digits than its factorization.

402324540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4019 (or 4017 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 402324540 is about 20058.0293149651. The cubic root of 402324540 is about 738.2308235758.

Adding to 402324540 its reverse (45423204), we get a palindrome (447747744).

The spelling of 402324540 in words is "four hundred two million, three hundred twenty-four thousand, five hundred forty".