7828090 has 16 divisors (see below), whose sum is σ = 14472072. Its totient is φ = 3046464.

The previous prime is 7828087. The next prime is 7828091. The reversal of 7828090 is 908287.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5716881 + 2111209 = 2391^2 + 1453^2 .

It is a super-2 number, since 2×7828090² = 122557986096200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7828091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10209 + ... + 10948.

Almost surely, 2^7828090 is an apocalyptic number.

7828090 is a deficient number, since it is larger than the sum of its proper divisors (6643982).

7828090 is a wasteful number, since it uses less digits than its factorization.

7828090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21201.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 7828090 is about 2797.8724059542. The cubic root of 7828090 is about 198.5570309051.

The spelling of 7828090 in words is "seven million, eight hundred twenty-eight thousand, ninety".