1156203840 has 224 divisors, whose sum is σ = 4047353856. Its totient is φ = 277309440.

The previous prime is 1156203833. The next prime is 1156203887. The reversal of 1156203840 is 483026511.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1156203798 and 1156203807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1087149 + ... + 1088211.

It is an arithmetic number, because the mean of its divisors is an integer number (18068544).

Almost surely, 2^1156203840 is an apocalyptic number.

1156203840 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 1156203840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2023676928).

1156203840 is an abundant number, since it is smaller than the sum of its proper divisors (2891150016).

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

1156203840 is a wasteful number, since it uses less digits than its factorization.

1156203840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197 (or 1187 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1156203840 is about 34002.9975149251. The cubic root of 1156203840 is about 1049.5701460438.

The spelling of 1156203840 in words is "one billion, one hundred fifty-six million, two hundred three thousand, eight hundred forty".