640301792 has 36 divisors (see below), whose sum is σ = 1365033600. Its totient is φ = 295521408.

The previous prime is 640301773. The next prime is 640301839. The reversal of 640301792 is 297103046.

It is a super-2 number, since 2×640301792² = 819972769676822528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53792 + ... + 64607.

It is an arithmetic number, because the mean of its divisors is an integer number (37917600).

Almost surely, 2^640301792 is an apocalyptic number.

It is an amenable number.

640301792 is an abundant number, since it is smaller than the sum of its proper divisors (724731808).

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

640301792 is a wasteful number, since it uses less digits than its factorization.

640301792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118435 (or 118414 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 640301792 is about 25304.1852664732. The cubic root of 640301792 is about 861.9093112172.

The spelling of 640301792 in words is "six hundred forty million, three hundred one thousand, seven hundred ninety-two".