78380715 has 16 divisors (see below), whose sum is σ = 143324928. Its totient is φ = 35831136.

The previous prime is 78380683. The next prime is 78380737. The reversal of 78380715 is 51708387.

It is not a de Polignac number, because 78380715 - 2⁵ = 78380683 is a prime.

It is a super-2 number, since 2×78380715² = 12287072967822450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373137 + ... + 373346.

It is an arithmetic number, because the mean of its divisors is an integer number (8957808).

Almost surely, 2^78380715 is an apocalyptic number.

78380715 is a deficient number, since it is larger than the sum of its proper divisors (64944213).

78380715 is a wasteful number, since it uses less digits than its factorization.

78380715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746498.

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 78380715 is about 8853.2883721248. The cubic root of 78380715 is about 427.9598963064.

The spelling of 78380715 in words is "seventy-eight million, three hundred eighty thousand, seven hundred fifteen".