641540304 has 40 divisors (see below), whose sum is σ = 1841459520. Its totient is φ = 213846624.

The previous prime is 641540303. The next prime is 641540321. The reversal of 641540304 is 403045146.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641540303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742092 + ... + 742955.

It is an arithmetic number, because the mean of its divisors is an integer number (46036488).

Almost surely, 2^641540304 is an apocalyptic number.

It is an amenable number.

641540304 is an abundant number, since it is smaller than the sum of its proper divisors (1199919216).

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

641540304 is a wasteful number, since it uses less digits than its factorization.

641540304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485064 (or 1485052 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 641540304 is about 25328.6459172219. The cubic root of 641540304 is about 862.4646730332.

The spelling of 641540304 in words is "six hundred forty-one million, five hundred forty thousand, three hundred four".