78620315 has 16 divisors (see below), whose sum is σ = 95754528. Its totient is φ = 61963776.

The previous prime is 78620281. The next prime is 78620317. The reversal of 78620315 is 51302687.

It is a happy number.

It is not a de Polignac number, because 78620315 - 2⁶ = 78620251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78620317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127949 + ... + 128561.

It is an arithmetic number, because the mean of its divisors is an integer number (5984658).

Almost surely, 2^78620315 is an apocalyptic number.

78620315 is a deficient number, since it is larger than the sum of its proper divisors (17134213).

78620315 is a wasteful number, since it uses less digits than its factorization.

78620315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 78620315 is about 8866.8097419534. The cubic root of 78620315 is about 428.3955259342.

The spelling of 78620315 in words is "seventy-eight million, six hundred twenty thousand, three hundred fifteen".