643250460 has 48 divisors (see below), whose sum is σ = 1839430656. Its totient is φ = 167883072.

The previous prime is 643250431. The next prime is 643250473. The reversal of 643250460 is 64052346.

643250460 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111232 + ... + 116871.

It is an arithmetic number, because the mean of its divisors is an integer number (38321472).

Almost surely, 2^643250460 is an apocalyptic number.

643250460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

643250460 is an abundant number, since it is smaller than the sum of its proper divisors (1196180196).

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

643250460 is a wasteful number, since it uses less digits than its factorization.

643250460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228162 (or 228160 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 643250460 is about 25362.3827744950. The cubic root of 643250460 is about 863.2303513398.

The spelling of 643250460 in words is "six hundred forty-three million, two hundred fifty thousand, four hundred sixty".