7820445 has 8 divisors (see below), whose sum is σ = 12512736. Its totient is φ = 4170896.

The previous prime is 7820429. The next prime is 7820479. The reversal of 7820445 is 5440287.

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 7820445 - 2⁴ = 7820429 is a prime.

It is a super-2 number, since 2×7820445² = 122318719996050, which contains 22 as substring.

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, 260667 + ... + 260696.

It is an arithmetic number, because the mean of its divisors is an integer number (1564092).

Almost surely, 2^7820445 is an apocalyptic number.

It is an amenable number.

7820445 is a deficient number, since it is larger than the sum of its proper divisors (4692291).

7820445 is a wasteful number, since it uses less digits than its factorization.

7820445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521371.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 7820445 is about 2796.5058555276. The cubic root of 7820445 is about 198.4923721814.

The spelling of 7820445 in words is "seven million, eight hundred twenty thousand, four hundred forty-five".