77113820 has 24 divisors (see below), whose sum is σ = 185073504. Its totient is φ = 26438976.

The previous prime is 77113811. The next prime is 77113823. The reversal of 77113820 is 2831177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77113823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275267 + ... + 275546.

It is an arithmetic number, because the mean of its divisors is an integer number (7711396).

Almost surely, 2^77113820 is an apocalyptic number.

77113820 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77113820 is an abundant number, since it is smaller than the sum of its proper divisors (107959684).

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

77113820 is a wasteful number, since it uses less digits than its factorization.

77113820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550829 (or 550827 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 77113820 is about 8781.4474888825. The cubic root of 77113820 is about 425.6416053015.

Adding to 77113820 its reverse (2831177), we get a palindrome (79944997).

The spelling of 77113820 in words is "seventy-seven million, one hundred thirteen thousand, eight hundred twenty".