1555278288 has 80 divisors (see below), whose sum is σ = 4289011200. Its totient is φ = 484202880.

The previous prime is 1555278233. The next prime is 1555278311. The reversal of 1555278288 is 8828725551.

1555278288 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1555278288.

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, 52743 + ... + 76761.

It is an arithmetic number, because the mean of its divisors is an integer number (53612640).

Almost surely, 2^1555278288 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 1555278288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2144505600).

1555278288 is an abundant number, since it is smaller than the sum of its proper divisors (2733732912).

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

1555278288 is a wasteful number, since it uses less digits than its factorization.

1555278288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24120 (or 24114 counting only the distinct ones).

The product of its digits is 1792000, while the sum is 51.

The square root of 1555278288 is about 39437.0167228709. The cubic root of 1555278288 is about 1158.6067021041.

The spelling of 1555278288 in words is "one billion, five hundred fifty-five million, two hundred seventy-eight thousand, two hundred eighty-eight".