1011840 has 128 divisors (see below), whose sum is σ = 3525120. Its totient is φ = 245760.

The previous prime is 1011827. The next prime is 1011889. The reversal of 1011840 is 481101.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 32625 + ... + 32655.

It is an arithmetic number, because the mean of its divisors is an integer number (27540).

2^1011840 is an apocalyptic number.

1011840 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 1011840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1762560).

1011840 is an abundant number, since it is smaller than the sum of its proper divisors (2513280).

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

1011840 is a wasteful number, since it uses less digits than its factorization.

1011840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1011840 is about 1005.9025797760. The cubic root of 1011840 is about 100.3931192144.

Adding to 1011840 its reverse (481101), we get a palindrome (1492941).

The spelling of 1011840 in words is "one million, eleven thousand, eight hundred forty".