1220742804 has 48 divisors (see below), whose sum is σ = 2908382400. Its totient is φ = 398401536.

The previous prime is 1220742793. The next prime is 1220742823. The reversal of 1220742804 is 4082470221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178602 + ... + 185310.

It is an arithmetic number, because the mean of its divisors is an integer number (60591300).

Almost surely, 2^1220742804 is an apocalyptic number.

It is an amenable number.

1220742804 is an abundant number, since it is smaller than the sum of its proper divisors (1687639596).

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

1220742804 is a wasteful number, since it uses less digits than its factorization.

1220742804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7032 (or 7030 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 1220742804 is about 34939.1299834441. The cubic root of 1220742804 is about 1068.7465463039.

The spelling of 1220742804 in words is "one billion, two hundred twenty million, seven hundred forty-two thousand, eight hundred four".