11900540 has 48 divisors (see below), whose sum is σ = 25909632. Its totient is φ = 4589376.

The previous prime is 11900531. The next prime is 11900543. The reversal of 11900540 is 4500911.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11900543) 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, 111167 + ... + 111273.

It is an arithmetic number, because the mean of its divisors is an integer number (539784).

Almost surely, 2^11900540 is an apocalyptic number.

11900540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11900540 is an abundant number, since it is smaller than the sum of its proper divisors (14009092).

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

11900540 is a wasteful number, since it uses less digits than its factorization.

11900540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 11900540 is about 3449.7159303340. The cubic root of 11900540 is about 228.3085746978.

The spelling of 11900540 in words is "eleven million, nine hundred thousand, five hundred forty".