402540321240 has 96 divisors (see below), whose sum is σ = 1317805519680. Its totient is φ = 106560539136.

The previous prime is 402540321223. The next prime is 402540321263. The reversal of 402540321240 is 42123045204.

402540321240 is a `hidden beast` number, since 4 + 0 + 2 + 5 + 403 + 212 + 40 = 666.

It is a super-4 number, since 4×402540321240⁴ (a number of 48 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4031584 + ... + 4130223.

It is an arithmetic number, because the mean of its divisors is an integer number (13727140830).

Almost surely, 2^402540321240 is an apocalyptic number.

402540321240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402540321240 is an abundant number, since it is smaller than the sum of its proper divisors (915265198440).

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

402540321240 is a wasteful number, since it uses less digits than its factorization.

402540321240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8161961 (or 8161954 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 402540321240 its reverse (42123045204), we get a palindrome (444663366444).

The spelling of 402540321240 in words is "four hundred two billion, five hundred forty million, three hundred twenty-one thousand, two hundred forty".