761988638 has 16 divisors (see below), whose sum is σ = 1183666176. Its totient is φ = 367647000.

The previous prime is 761988631. The next prime is 761988691. The reversal of 761988638 is 836889167.

It is a happy number.

761988638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761988631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46238 + ... + 60513.

It is an arithmetic number, because the mean of its divisors is an integer number (73979136).

Almost surely, 2^761988638 is an apocalyptic number.

761988638 is a deficient number, since it is larger than the sum of its proper divisors (421677538).

761988638 is a wasteful number, since it uses less digits than its factorization.

761988638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106879.

The product of its digits is 3483648, while the sum is 56.

The square root of 761988638 is about 27604.1416820013. The cubic root of 761988638 is about 913.3757953808.

The spelling of 761988638 in words is "seven hundred sixty-one million, nine hundred eighty-eight thousand, six hundred thirty-eight".