10840140 has 36 divisors (see below), whose sum is σ = 32882304. Its totient is φ = 2890656.

The previous prime is 10840117. The next prime is 10840147. The reversal of 10840140 is 4104801.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (10840147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29932 + ... + 30291.

Almost surely, 2^10840140 is an apocalyptic number.

10840140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10840140 is an abundant number, since it is smaller than the sum of its proper divisors (22042164).

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

10840140 is a wasteful number, since it uses less digits than its factorization.

10840140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60238 (or 60233 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 10840140 is about 3292.4367875481. The cubic root of 10840140 is about 221.3153976934.

Adding to 10840140 its reverse (4104801), we get a palindrome (14944941).

The spelling of 10840140 in words is "ten million, eight hundred forty thousand, one hundred forty".