1220685794 has 8 divisors (see below), whose sum is σ = 1833357648. Its totient is φ = 609566580.

The previous prime is 1220685793. The next prime is 1220685859. The reversal of 1220685794 is 4975860221.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1220685793) 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, 386192 + ... + 389339.

It is an arithmetic number, because the mean of its divisors is an integer number (229169706).

Almost surely, 2^1220685794 is an apocalyptic number.

1220685794 is a deficient number, since it is larger than the sum of its proper divisors (612671854).

1220685794 is an equidigital number, since it uses as much as digits as its factorization.

1220685794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776320.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1220685794 is about 34938.3141264715. The cubic root of 1220685794 is about 1068.7299088411.

The spelling of 1220685794 in words is "one billion, two hundred twenty million, six hundred eighty-five thousand, seven hundred ninety-four".