1101399040 has 176 divisors, whose sum is σ = 3065587200. Its totient is φ = 371884032.

The previous prime is 1101399023. The next prime is 1101399053. The reversal of 1101399040 is 409931011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2831166 + ... + 2831554.

Almost surely, 2^1101399040 is an apocalyptic number.

1101399040 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 1101399040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1532793600).

1101399040 is an abundant number, since it is smaller than the sum of its proper divisors (1964188160).

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

1101399040 is an equidigital number, since it uses as much as digits as its factorization.

1101399040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 1101399040 is about 33187.3325231179. The cubic root of 1101399040 is about 1032.7175667696.

The spelling of 1101399040 in words is "one billion, one hundred one million, three hundred ninety-nine thousand, forty".