11810640 has 40 divisors (see below), whose sum is σ = 36613728. Its totient is φ = 3149440.

The previous prime is 11810629. The next prime is 11810657. The reversal of 11810640 is 4601811.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24366 + ... + 24845.

Almost surely, 2^11810640 is an apocalyptic number.

11810640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11810640 is an abundant number, since it is smaller than the sum of its proper divisors (24803088).

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

11810640 is a wasteful number, since it uses less digits than its factorization.

11810640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49227 (or 49221 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 11810640 is about 3436.6611703803. The cubic root of 11810640 is about 227.7322187066.

The spelling of 11810640 in words is "eleven million, eight hundred ten thousand, six hundred forty".