402728545640 has 32 divisors (see below), whose sum is σ = 914936705280. Its totient is φ = 159527422272.

The previous prime is 402728545631. The next prime is 402728545649. The reversal of 402728545640 is 46545827204.

It is an interprime number because it is at equal distance from previous prime (402728545631) and next prime (402728545649).

It is not an unprimeable number, because it can be changed into a prime (402728545649) 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, 48870704 + ... + 48878943.

It is an arithmetic number, because the mean of its divisors is an integer number (28591772040).

Almost surely, 2^402728545640 is an apocalyptic number.

402728545640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402728545640 is an abundant number, since it is smaller than the sum of its proper divisors (512208159640).

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

402728545640 is a wasteful number, since it uses less digits than its factorization.

402728545640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97749761 (or 97749757 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 47.

The spelling of 402728545640 in words is "four hundred two billion, seven hundred twenty-eight million, five hundred forty-five thousand, six hundred forty".