77243020 has 12 divisors (see below), whose sum is σ = 162210384. Its totient is φ = 30897200.

The previous prime is 77243009. The next prime is 77243059. The reversal of 77243020 is 2034277.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1931056 + ... + 1931095.

It is an arithmetic number, because the mean of its divisors is an integer number (13517532).

Almost surely, 2^77243020 is an apocalyptic number.

It is an amenable number.

77243020 is an abundant number, since it is smaller than the sum of its proper divisors (84967364).

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

77243020 is a wasteful number, since it uses less digits than its factorization.

77243020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3862160 (or 3862158 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 77243020 is about 8788.8008283269. The cubic root of 77243020 is about 425.8791857656.

Adding to 77243020 its reverse (2034277), we get a palindrome (79277297).

The spelling of 77243020 in words is "seventy-seven million, two hundred forty-three thousand, twenty".