767691138 has 16 divisors (see below), whose sum is σ = 1568050560. Its totient is φ = 250452336.

The previous prime is 767691137. The next prime is 767691139. The reversal of 767691138 is 831196767.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (767691137) and next prime (767691139).

It is not an unprimeable number, because it can be changed into a prime (767691137) 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 7 ways as a sum of consecutive naturals, for example, 1360873 + ... + 1361436.

It is an arithmetic number, because the mean of its divisors is an integer number (98003160).

Almost surely, 2^767691138 is an apocalyptic number.

767691138 is an abundant number, since it is smaller than the sum of its proper divisors (800359422).

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

767691138 is a wasteful number, since it uses less digits than its factorization.

767691138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722361.

The product of its digits is 381024, while the sum is 48.

The square root of 767691138 is about 27707.2398120058. The cubic root of 767691138 is about 915.6486141339.

The spelling of 767691138 in words is "seven hundred sixty-seven million, six hundred ninety-one thousand, one hundred thirty-eight".