10640140 has 24 divisors (see below), whose sum is σ = 25536672. Its totient is φ = 3648000.

The previous prime is 10640107. The next prime is 10640143. The reversal of 10640140 is 4104601.

It is a happy number.

It is a super-2 number, since 2×10640140² = 226425158439200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10640143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37861 + ... + 38140.

It is an arithmetic number, because the mean of its divisors is an integer number (1064028).

Almost surely, 2^10640140 is an apocalyptic number.

10640140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10640140 is an abundant number, since it is smaller than the sum of its proper divisors (14896532).

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

10640140 is a wasteful number, since it uses less digits than its factorization.

10640140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76017 (or 76015 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 10640140 is about 3261.9227458663. The cubic root of 10640140 is about 219.9458544436.

Adding to 10640140 its reverse (4104601), we get a palindrome (14744741).

The spelling of 10640140 in words is "ten million, six hundred forty thousand, one hundred forty".