61086320 has 20 divisors (see below), whose sum is σ = 142025880. Its totient is φ = 24434496.

The previous prime is 61086301. The next prime is 61086343. The reversal of 61086320 is 2368016.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×61086320² = 7463076982284800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61086320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381710 + ... + 381869.

It is an arithmetic number, because the mean of its divisors is an integer number (7101294).

Almost surely, 2^61086320 is an apocalyptic number.

It is an amenable number.

61086320 is an abundant number, since it is smaller than the sum of its proper divisors (80939560).

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

61086320 is a wasteful number, since it uses less digits than its factorization.

61086320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763592 (or 763586 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 61086320 is about 7815.7737940654. The cubic root of 61086320 is about 393.8353129998.

The spelling of 61086320 in words is "sixty-one million, eighty-six thousand, three hundred twenty".