8261620 has 12 divisors (see below), whose sum is σ = 17349444. Its totient is φ = 3304640.

The previous prime is 8261573. The next prime is 8261621. The reversal of 8261620 is 261628.

It can be written as a sum of positive squares in 2 ways, for example, as 5963364 + 2298256 = 2442^2 + 1516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8261621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206521 + ... + 206560.

It is an arithmetic number, because the mean of its divisors is an integer number (1445787).

Almost surely, 2^8261620 is an apocalyptic number.

It is an amenable number.

8261620 is an abundant number, since it is smaller than the sum of its proper divisors (9087824).

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

8261620 is a wasteful number, since it uses less digits than its factorization.

8261620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413090 (or 413088 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 8261620 is about 2874.3033938678. The cubic root of 8261620 is about 202.1568236153.

The spelling of 8261620 in words is "eight million, two hundred sixty-one thousand, six hundred twenty".