640024682 has 8 divisors (see below), whose sum is σ = 1047313152. Its totient is φ = 290920300.

The previous prime is 640024643. The next prime is 640024717. The reversal of 640024682 is 286420046.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×640024682² = 819263187138402248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14545994 + ... + 14546037.

It is an arithmetic number, because the mean of its divisors is an integer number (130914144).

Almost surely, 2^640024682 is an apocalyptic number.

640024682 is a deficient number, since it is larger than the sum of its proper divisors (407288470).

640024682 is a wasteful number, since it uses less digits than its factorization.

640024682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29092044.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 640024682 is about 25298.7090975014. The cubic root of 640024682 is about 861.7849541531.

The spelling of 640024682 in words is "six hundred forty million, twenty-four thousand, six hundred eighty-two".