402145530 has 64 divisors (see below), whose sum is σ = 979378560. Its totient is φ = 105670656.

The previous prime is 402145493. The next prime is 402145537. The reversal of 402145530 is 35541204.

It is a self number, because there is not a number n which added to its sum of digits gives 402145530.

It is not an unprimeable number, because it can be changed into a prime (402145537) 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, 1060881 + ... + 1061259.

It is an arithmetic number, because the mean of its divisors is an integer number (15302790).

Almost surely, 2^402145530 is an apocalyptic number.

402145530 is an abundant number, since it is smaller than the sum of its proper divisors (577233030).

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

402145530 is a wasteful number, since it uses less digits than its factorization.

402145530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 402145530 is about 20053.5665157099. The cubic root of 402145530 is about 738.1213180306.

Adding to 402145530 its reverse (35541204), we get a palindrome (437686734).

The spelling of 402145530 in words is "four hundred two million, one hundred forty-five thousand, five hundred thirty".