207640634 has 8 divisors (see below), whose sum is σ = 311580480. Its totient is φ = 103780476.

The previous prime is 207640627. The next prime is 207640637. The reversal of 207640634 is 436046702.

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

It is a super-2 number, since 2×207640634² = 86229265775843912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 207640634.

It is not an unprimeable number, because it can be changed into a prime (207640637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12914 + ... + 24125.

It is an arithmetic number, because the mean of its divisors is an integer number (38947560).

Almost surely, 2^207640634 is an apocalyptic number.

207640634 is a deficient number, since it is larger than the sum of its proper divisors (103939846).

207640634 is a wasteful number, since it uses less digits than its factorization.

207640634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39844.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 207640634 is about 14409.7409414604. The cubic root of 207640634 is about 592.1577925040.

The spelling of 207640634 in words is "two hundred seven million, six hundred forty thousand, six hundred thirty-four".