640761462 has 64 divisors (see below), whose sum is σ = 1620933120. Its totient is φ = 185724000.

The previous prime is 640761427. The next prime is 640761469. The reversal of 640761462 is 264167046.

640761462 is a `hidden beast` number, since 640 + 7 + 6 + 1 + 4 + 6 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640761469) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9789 + ... + 37112.

It is an arithmetic number, because the mean of its divisors is an integer number (25327080).

Almost surely, 2^640761462 is an apocalyptic number.

640761462 is an abundant number, since it is smaller than the sum of its proper divisors (980171658).

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

640761462 is a wasteful number, since it uses less digits than its factorization.

640761462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46946 (or 46940 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 640761462 is about 25313.2665217273. The cubic root of 640761462 is about 862.1155155869.

The spelling of 640761462 in words is "six hundred forty million, seven hundred sixty-one thousand, four hundred sixty-two".