10491140 has 48 divisors (see below), whose sum is σ = 24615360. Its totient is φ = 3722880.

The previous prime is 10491139. The next prime is 10491149. The reversal of 10491140 is 4119401.

10491140 = 105² + 106² + ... + 319².

It is a super-2 number, since 2×10491140² = 220128036999200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (10491149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8906 + ... + 10014.

It is an arithmetic number, because the mean of its divisors is an integer number (512820).

Almost surely, 2^10491140 is an apocalyptic number.

10491140 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 10491140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12307680).

10491140 is an abundant number, since it is smaller than the sum of its proper divisors (14124220).

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

10491140 is a wasteful number, since it uses less digits than its factorization.

10491140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1170 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 10491140 is about 3239.0029330027. The cubic root of 10491140 is about 218.9143483298.

The spelling of 10491140 in words is "ten million, four hundred ninety-one thousand, one hundred forty".