1220878044 has 72 divisors (see below), whose sum is σ = 3129766640. Its totient is φ = 401241600.

The previous prime is 1220878039. The next prime is 1220878067. The reversal of 1220878044 is 4408780221.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 945039 + ... + 946329.

Almost surely, 2^1220878044 is an apocalyptic number.

It is an amenable number.

1220878044 is an abundant number, since it is smaller than the sum of its proper divisors (1908888596).

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

1220878044 is a wasteful number, since it uses less digits than its factorization.

1220878044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651 (or 1646 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 1220878044 is about 34941.0652957233. The cubic root of 1220878044 is about 1068.7860118778.

The spelling of 1220878044 in words is "one billion, two hundred twenty million, eight hundred seventy-eight thousand, forty-four".