78863465 has 16 divisors (see below), whose sum is σ = 97880400. Its totient is φ = 60952320.

The previous prime is 78863461. The next prime is 78863479. The reversal of 78863465 is 56436887.

It can be written as a sum of positive squares in 8 ways, for example, as 80089 + 78783376 = 283^2 + 8876^2 .

It is not a de Polignac number, because 78863465 - 2² = 78863461 is a prime.

It is a super-2 number, since 2×78863465² = 12438892223612450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78863461) 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, 26135 + ... + 28995.

It is an arithmetic number, because the mean of its divisors is an integer number (6117525).

Almost surely, 2^78863465 is an apocalyptic number.

It is an amenable number.

78863465 is a deficient number, since it is larger than the sum of its proper divisors (19016935).

78863465 is a wasteful number, since it uses less digits than its factorization.

78863465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3052.

The product of its digits is 967680, while the sum is 47.

The square root of 78863465 is about 8880.5104019983. The cubic root of 78863465 is about 428.8367061083.

The spelling of 78863465 in words is "seventy-eight million, eight hundred sixty-three thousand, four hundred sixty-five".