775584138 has 32 divisors (see below), whose sum is σ = 1785530880. Its totient is φ = 219999600.

The previous prime is 775584137. The next prime is 775584179. The reversal of 775584138 is 831485577.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (775584137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60588 + ... + 72263.

It is an arithmetic number, because the mean of its divisors is an integer number (55797840).

Almost surely, 2^775584138 is an apocalyptic number.

775584138 is an abundant number, since it is smaller than the sum of its proper divisors (1009946742).

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

775584138 is a wasteful number, since it uses less digits than its factorization.

775584138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133002.

The product of its digits is 940800, while the sum is 48.

The square root of 775584138 is about 27849.3112661696. The cubic root of 775584138 is about 918.7759943407.

The spelling of 775584138 in words is "seven hundred seventy-five million, five hundred eighty-four thousand, one hundred thirty-eight".