1220392404 has 144 divisors (see below), whose sum is σ = 3904083456. Its totient is φ = 312206400.

The previous prime is 1220392373. The next prime is 1220392427. The reversal of 1220392404 is 4042930221.

1220392404 is a `hidden beast` number, since 1 + 220 + 39 + 2 + 404 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 182439 + ... + 189009.

Almost surely, 2^1220392404 is an apocalyptic number.

1220392404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220392404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1952041728).

1220392404 is an abundant number, since it is smaller than the sum of its proper divisors (2683691052).

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

1220392404 is a wasteful number, since it uses less digits than its factorization.

1220392404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6666 (or 6661 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1220392404 is about 34934.1151884515. The cubic root of 1220392404 is about 1068.6442794368.

The spelling of 1220392404 in words is "one billion, two hundred twenty million, three hundred ninety-two thousand, four hundred four".