1555941240 has 384 divisors, whose sum is σ = 6019453440. Its totient is φ = 341203968.

The previous prime is 1555941209. The next prime is 1555941253. The reversal of 1555941240 is 421495551.

1555941240 is a `hidden beast` number, since 1 + 55 + 594 + 12 + 4 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1555941195 and 1555941204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8993794 + ... + 8993966.

It is an arithmetic number, because the mean of its divisors is an integer number (15675660).

Almost surely, 2^1555941240 is an apocalyptic number.

1555941240 is a gapful number since it is divisible by the number (10) 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 1555941240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3009726720).

1555941240 is an abundant number, since it is smaller than the sum of its proper divisors (4463512200).

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

1555941240 is a wasteful number, since it uses less digits than its factorization.

1555941240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 1555941240 is about 39445.4210270343. The cubic root of 1555941240 is about 1158.7713010541.

The spelling of 1555941240 in words is "one billion, five hundred fifty-five million, nine hundred forty-one thousand, two hundred forty".