1220630826 has 16 divisors (see below), whose sum is σ = 2443145184. Its totient is φ = 406563024.

The previous prime is 1220630743. The next prime is 1220630839. The reversal of 1220630826 is 6280360221.

It is a super-2 number, since 2×1220630826² = 2979879226762884552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220630793 and 1220630802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69985 + ... + 85668.

It is an arithmetic number, because the mean of its divisors is an integer number (152696574).

Almost surely, 2^1220630826 is an apocalyptic number.

1220630826 is an abundant number, since it is smaller than the sum of its proper divisors (1222514358).

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

1220630826 is a wasteful number, since it uses less digits than its factorization.

1220630826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156965.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1220630826 is about 34937.5274740500. The cubic root of 1220630826 is about 1068.7138668130.

The spelling of 1220630826 in words is "one billion, two hundred twenty million, six hundred thirty thousand, eight hundred twenty-six".