78415365 has 16 divisors (see below), whose sum is σ = 143388288. Its totient is φ = 35846976.

The previous prime is 78415343. The next prime is 78415369. The reversal of 78415365 is 56351487.

It is not a de Polignac number, because 78415365 - 2⁶ = 78415301 is a prime.

It is a super-2 number, since 2×78415365² = 12297938936166450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78415369) 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, 373302 + ... + 373511.

It is an arithmetic number, because the mean of its divisors is an integer number (8961768).

Almost surely, 2^78415365 is an apocalyptic number.

It is an amenable number.

78415365 is a deficient number, since it is larger than the sum of its proper divisors (64972923).

78415365 is a wasteful number, since it uses less digits than its factorization.

78415365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746828.

The product of its digits is 100800, while the sum is 39.

The square root of 78415365 is about 8855.2450558977. The cubic root of 78415365 is about 428.0229501916.

The spelling of 78415365 in words is "seventy-eight million, four hundred fifteen thousand, three hundred sixty-five".