365978 has 8 divisors (see below), whose sum is σ = 577920. Its totient is φ = 173340.

The previous prime is 365969. The next prime is 365983. The reversal of 365978 is 879563.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 9631 = 365978 / (3 + 6 + 5 + 9 + 7 + 8).

It is a Curzon number.

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 365978.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4778 + ... + 4853.

It is an arithmetic number, because the mean of its divisors is an integer number (72240).

2³⁶⁵⁹⁷⁸ is an apocalyptic number.

365978 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

365978 is a deficient number, since it is larger than the sum of its proper divisors (211942).

365978 is a wasteful number, since it uses less digits than its factorization.

365978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9652.

The product of its digits is 45360, while the sum is 38.

The square root of 365978 is about 604.9611557778. The cubic root of 365978 is about 71.5294676978.

Subtracting from 365978 its sum of digits (38), we obtain a triangular number (365940 = T₈₅₅).

The spelling of 365978 in words is "three hundred sixty-five thousand, nine hundred seventy-eight".