640882535 has 8 divisors (see below), whose sum is σ = 786944400. Its totient is φ = 500782464.

The previous prime is 640882493. The next prime is 640882573. The reversal of 640882535 is 535288046.

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

It is a cyclic number.

It is not a de Polignac number, because 640882535 - 2¹⁰ = 640881511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640882492 and 640882501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490210 + ... + 1490639.

It is an arithmetic number, because the mean of its divisors is an integer number (98368050).

Almost surely, 2^640882535 is an apocalyptic number.

640882535 is a deficient number, since it is larger than the sum of its proper divisors (146061865).

640882535 is a wasteful number, since it uses less digits than its factorization.

640882535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980897.

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 640882535 is about 25315.6579017809. The cubic root of 640882535 is about 862.1698115793.

The spelling of 640882535 in words is "six hundred forty million, eight hundred eighty-two thousand, five hundred thirty-five".