78344863 has 8 divisors (see below), whose sum is σ = 81884880. Its totient is φ = 74860800.

The previous prime is 78344813. The next prime is 78344867. The reversal of 78344863 is 36844387.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78344863 - 2⁹ = 78344351 is a prime.

It is a super-2 number, since 2×78344863² = 12275835116977538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78344867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11113 + ... + 16738.

It is an arithmetic number, because the mean of its divisors is an integer number (10235610).

Almost surely, 2^78344863 is an apocalyptic number.

78344863 is a deficient number, since it is larger than the sum of its proper divisors (3540017).

78344863 is a wasteful number, since it uses less digits than its factorization.

78344863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27977.

The product of its digits is 387072, while the sum is 43.

The square root of 78344863 is about 8851.2633561543. The cubic root of 78344863 is about 427.8946355334.

The spelling of 78344863 in words is "seventy-eight million, three hundred forty-four thousand, eight hundred sixty-three".