640060632 has 48 divisors (see below), whose sum is σ = 1780356240. Its totient is φ = 207586368.

The previous prime is 640060601. The next prime is 640060637. The reversal of 640060632 is 236060046.

It is a super-2 number, since 2×640060632² = 819355225272478848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 640060596 and 640060605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640060637) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 117468 + ... + 122795.

It is an arithmetic number, because the mean of its divisors is an integer number (37090755).

Almost surely, 2^640060632 is an apocalyptic number.

It is an amenable number.

640060632 is an abundant number, since it is smaller than the sum of its proper divisors (1140295608).

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

640060632 is a wasteful number, since it uses less digits than its factorization.

640060632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240312 (or 240305 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 640060632 is about 25299.4195980856. The cubic root of 640060632 is about 861.8010892543.

The spelling of 640060632 in words is "six hundred forty million, sixty thousand, six hundred thirty-two".