7820830 has 8 divisors (see below), whose sum is σ = 14077512. Its totient is φ = 3128328.

The previous prime is 7820821. The next prime is 7820881. The reversal of 7820830 is 380287.

It is a happy number.

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

It is a super-2 number, since 2×7820830² = 122330763777800, 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 3 ways as a sum of consecutive naturals, for example, 391032 + ... + 391051.

It is an arithmetic number, because the mean of its divisors is an integer number (1759689).

Almost surely, 2^7820830 is an apocalyptic number.

7820830 is a deficient number, since it is larger than the sum of its proper divisors (6256682).

7820830 is a wasteful number, since it uses less digits than its factorization.

7820830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782090.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 7820830 is about 2796.5746905813. The cubic root of 7820830 is about 198.4956293835.

The spelling of 7820830 in words is "seven million, eight hundred twenty thousand, eight hundred thirty".