1149987540 has 288 divisors, whose sum is σ = 3777822720. Its totient is φ = 260402688.

The previous prime is 1149987523. The next prime is 1149987581. The reversal of 1149987540 is 457899411.

It is a self number, because there is not a number n which added to its sum of digits gives 1149987540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9054957 + ... + 9055083.

It is an arithmetic number, because the mean of its divisors is an integer number (13117440).

Almost surely, 2^1149987540 is an apocalyptic number.

1149987540 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 1149987540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1888911360).

1149987540 is an abundant number, since it is smaller than the sum of its proper divisors (2627835180).

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

1149987540 is a wasteful number, since it uses less digits than its factorization.

1149987540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 1149987540 is about 33911.4662024513. The cubic root of 1149987540 is about 1047.6857693285.

The spelling of 1149987540 in words is "one billion, one hundred forty-nine million, nine hundred eighty-seven thousand, five hundred forty".