402064531240 has 32 divisors (see below), whose sum is σ = 906502826880. Its totient is φ = 160495566912.

The previous prime is 402064531201. The next prime is 402064531247. The reversal of 402064531240 is 42135460204.

It is not an unprimeable number, because it can be changed into a prime (402064531247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10300452 + ... + 10339411.

It is an arithmetic number, because the mean of its divisors is an integer number (28328213340).

Almost surely, 2^402064531240 is an apocalyptic number.

402064531240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402064531240 is an abundant number, since it is smaller than the sum of its proper divisors (504438295640).

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

402064531240 is a wasteful number, since it uses less digits than its factorization.

402064531240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20640361 (or 20640357 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 402064531240 its reverse (42135460204), we get a palindrome (444199991444).

The spelling of 402064531240 in words is "four hundred two billion, sixty-four million, five hundred thirty-one thousand, two hundred forty".