78130740 has 24 divisors (see below), whose sum is σ = 218766240. Its totient is φ = 20834848.

The previous prime is 78130729. The next prime is 78130751. The reversal of 78130740 is 4703187.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78130729) and next prime (78130751).

It is a super-2 number, since 2×78130740² = 12208825065895200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 78130698 and 78130707.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 651030 + ... + 651149.

It is an arithmetic number, because the mean of its divisors is an integer number (9115260).

Almost surely, 2^78130740 is an apocalyptic number.

It is an amenable number.

78130740 is an abundant number, since it is smaller than the sum of its proper divisors (140635500).

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

78130740 is a wasteful number, since it uses less digits than its factorization.

78130740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302191 (or 1302189 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 78130740 is about 8839.1594623018. The cubic root of 78130740 is about 427.5044560255.

The spelling of 78130740 in words is "seventy-eight million, one hundred thirty thousand, seven hundred forty".