78397443 has 16 divisors (see below), whose sum is σ = 116736000. Its totient is φ = 51998760.

The previous prime is 78397399. The next prime is 78397483. The reversal of 78397443 is 34479387.

It is a happy number.

It is not a de Polignac number, because 78397443 - 2⁶ = 78397379 is a prime.

It is a super-2 number, since 2×78397443² = 12292318137876498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78397483) 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, 1923 + ... + 12668.

It is an arithmetic number, because the mean of its divisors is an integer number (7296000).

Almost surely, 2^78397443 is an apocalyptic number.

78397443 is a deficient number, since it is larger than the sum of its proper divisors (38338557).

78397443 is a wasteful number, since it uses less digits than its factorization.

78397443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14799 (or 14793 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 78397443 is about 8854.2330554374. The cubic root of 78397443 is about 427.9903391857.

The spelling of 78397443 in words is "seventy-eight million, three hundred ninety-seven thousand, four hundred forty-three".