78770930 has 24 divisors (see below), whose sum is σ = 164937708. Its totient is φ = 27007008.

The previous prime is 78770917. The next prime is 78770933. The reversal of 78770930 is 3907787.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63568729 + 15202201 = 7973^2 + 3899^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78770933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79889 + ... + 80868.

Almost surely, 2^78770930 is an apocalyptic number.

78770930 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78770930 is an abundant number, since it is smaller than the sum of its proper divisors (86166778).

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

78770930 is a wasteful number, since it uses less digits than its factorization.

78770930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160778 (or 160771 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 78770930 is about 8875.2988682072. The cubic root of 78770930 is about 428.6689142786.

It can be divided in two parts, 787 and 70930, that added together give a palindrome (71717).

The spelling of 78770930 in words is "seventy-eight million, seven hundred seventy thousand, nine hundred thirty".