1556227404 has 72 divisors (see below), whose sum is σ = 4211171328. Its totient is φ = 501999120.

The previous prime is 1556227381. The next prime is 1556227423. The reversal of 1556227404 is 4047226551.

It is a happy number.

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

It is a zygodrome in base 3.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4309 + ... + 55955.

Almost surely, 2^1556227404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1556227404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2105585664).

1556227404 is an abundant number, since it is smaller than the sum of its proper divisors (2654943924).

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

1556227404 is a wasteful number, since it uses less digits than its factorization.

1556227404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51697 (or 51683 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 1556227404 is about 39449.0482014459. The cubic root of 1556227404 is about 1158.8423359354.

The spelling of 1556227404 in words is "one billion, five hundred fifty-six million, two hundred twenty-seven thousand, four hundred four".