77117740 has 24 divisors (see below), whose sum is σ = 185082912. Its totient is φ = 26440320.

The previous prime is 77117693. The next prime is 77117749. The reversal of 77117740 is 4771177.

It is a junction number, because it is equal to n+sod(n) for n = 77117696 and 77117705.

It is not an unprimeable number, because it can be changed into a prime (77117749) 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, 275281 + ... + 275560.

It is an arithmetic number, because the mean of its divisors is an integer number (7711788).

Almost surely, 2^77117740 is an apocalyptic number.

77117740 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77117740 is an abundant number, since it is smaller than the sum of its proper divisors (107965172).

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

77117740 is a wasteful number, since it uses less digits than its factorization.

77117740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550857 (or 550855 counting only the distinct ones).

The product of its (nonzero) digits is 9604, while the sum is 34.

The square root of 77117740 is about 8781.6706838733. The cubic root of 77117740 is about 425.6488175272.

It can be divided in two parts, 7711 and 7740, that added together give a palindrome (15451).

The spelling of 77117740 in words is "seventy-seven million, one hundred seventeen thousand, seven hundred forty".