7823945 has 8 divisors (see below), whose sum is σ = 9404160. Its totient is φ = 6248880.

The previous prime is 7823903. The next prime is 7823951. The reversal of 7823945 is 5493287.

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

It is not a de Polignac number, because 7823945 - 2²⁰ = 6775369 is a prime.

It is a super-2 number, since 2×7823945² = 122428230726050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7823899 and 7823908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4166 + ... + 5744.

It is an arithmetic number, because the mean of its divisors is an integer number (1175520).

Almost surely, 2^7823945 is an apocalyptic number.

It is an amenable number.

7823945 is a deficient number, since it is larger than the sum of its proper divisors (1580215).

7823945 is a wasteful number, since it uses less digits than its factorization.

7823945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575.

The product of its digits is 60480, while the sum is 38.

The square root of 7823945 is about 2797.1315664445. The cubic root of 7823945 is about 198.5219791790.

The spelling of 7823945 in words is "seven million, eight hundred twenty-three thousand, nine hundred forty-five".