1056820686 has 8 divisors (see below), whose sum is σ = 2113641384. Its totient is φ = 352273560.

The previous prime is 1056820673. The next prime is 1056820711. The reversal of 1056820686 is 6860286501.

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

1056820686 is an admirable number.

It is a super-2 number, since 2×1056820686² = 2233739924715021192, 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, 88068385 + ... + 88068396.

It is an arithmetic number, because the mean of its divisors is an integer number (264205173).

Almost surely, 2^1056820686 is an apocalyptic number.

1056820686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1056820686 is a wasteful number, since it uses less digits than its factorization.

1056820686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176136786.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 1056820686 is about 32508.7785990185. The cubic root of 1056820686 is about 1018.5924086794.

The spelling of 1056820686 in words is "one billion, fifty-six million, eight hundred twenty thousand, six hundred eighty-six".