78811130 has 8 divisors (see below), whose sum is σ = 141860052. Its totient is φ = 31524448.

The previous prime is 78811129. The next prime is 78811163. The reversal of 78811130 is 3111887.

It can be written as a sum of positive squares in 2 ways, for example, as 75151561 + 3659569 = 8669^2 + 1913^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78811130² = 12422388423753800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78811093 and 78811102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3940547 + ... + 3940566.

Almost surely, 2^78811130 is an apocalyptic number.

78811130 is a deficient number, since it is larger than the sum of its proper divisors (63048922).

78811130 is a wasteful number, since it uses less digits than its factorization.

78811130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7881120.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 78811130 is about 8877.5632918048. The cubic root of 78811130 is about 428.7418242540.

The spelling of 78811130 in words is "seventy-eight million, eight hundred eleven thousand, one hundred thirty".