1220786469 has 24 divisors (see below), whose sum is σ = 2062137792. Its totient is φ = 681367680.

The previous prime is 1220786467. The next prime is 1220786503. The reversal of 1220786469 is 9646870221.

It is a happy number.

It is not a de Polignac number, because 1220786469 - 2¹ = 1220786467 is a prime.

It is a super-2 number, since 2×1220786469² = 2980639205786975922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220786467) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222612 + ... + 228029.

It is an arithmetic number, because the mean of its divisors is an integer number (85922408).

Almost surely, 2^1220786469 is an apocalyptic number.

It is an amenable number.

1220786469 is a deficient number, since it is larger than the sum of its proper divisors (841351323).

1220786469 is a wasteful number, since it uses less digits than its factorization.

1220786469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450697 (or 450694 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 1220786469 is about 34939.7548503134. The cubic root of 1220786469 is about 1068.7592888902.

The spelling of 1220786469 in words is "one billion, two hundred twenty million, seven hundred eighty-six thousand, four hundred sixty-nine".