78880365 has 32 divisors (see below), whose sum is σ = 140607360. Its totient is φ = 41956992.

The previous prime is 78880349. The next prime is 78880367. The reversal of 78880365 is 56308887.

It is not a de Polignac number, because 78880365 - 2⁴ = 78880349 is a prime.

It is a super-2 number, since 2×78880365² = 12444223965066450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 78880365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78880367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82822 + ... + 83768.

It is an arithmetic number, because the mean of its divisors is an integer number (4393980).

Almost surely, 2^78880365 is an apocalyptic number.

It is an amenable number.

78880365 is a deficient number, since it is larger than the sum of its proper divisors (61726995).

78880365 is a wasteful number, since it uses less digits than its factorization.

78880365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 78880365 is about 8881.4618729126. The cubic root of 78880365 is about 428.8673363573.

The spelling of 78880365 in words is "seventy-eight million, eight hundred eighty thousand, three hundred sixty-five".