7825220 has 24 divisors (see below), whose sum is σ = 17697624. Its totient is φ = 2889216.

The previous prime is 7825217. The next prime is 7825247. The reversal of 7825220 is 225287.

It can be written as a sum of positive squares in 4 ways, for example, as 350464 + 7474756 = 592^2 + 2734^2 .

It is a super-2 number, since 2×7825220² = 122468136096800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 7825220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14789 + ... + 15308.

It is an arithmetic number, because the mean of its divisors is an integer number (737401).

Almost surely, 2^7825220 is an apocalyptic number.

It is an amenable number.

7825220 is an abundant number, since it is smaller than the sum of its proper divisors (9872404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7825220 is a wasteful number, since it uses less digits than its factorization.

7825220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30119 (or 30117 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 7825220 is about 2797.3594692138. The cubic root of 7825220 is about 198.5327623911.

The spelling of 7825220 in words is "seven million, eight hundred twenty-five thousand, two hundred twenty".