1101987840 has 272 divisors, whose sum is σ = 3774844800. Its totient is φ = 273678336.

The previous prime is 1101987829. The next prime is 1101987853. The reversal of 1101987840 is 487891011.

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, 18677731 + ... + 18677789.

Almost surely, 2^1101987840 is an apocalyptic number.

1101987840 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 1101987840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1887422400).

1101987840 is an abundant number, since it is smaller than the sum of its proper divisors (2672856960).

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

1101987840 is an frugal number, since it uses more digits than its factorization.

1101987840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 1101987840 is about 33196.2021924195. The cubic root of 1101987840 is about 1032.9015617789.

The spelling of 1101987840 in words is "one billion, one hundred one million, nine hundred eighty-seven thousand, eight hundred forty".