11667540 has 48 divisors (see below), whose sum is σ = 32897088. Its totient is φ = 3089664.

The previous prime is 11667529. The next prime is 11667547. The reversal of 11667540 is 4576611.

It is a super-2 number, since 2×11667540² = 272262979303200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 11667498 and 11667507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11667547) 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, 9184 + ... + 10376.

It is an arithmetic number, because the mean of its divisors is an integer number (685356).

Almost surely, 2^11667540 is an apocalyptic number.

11667540 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 11667540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16448544).

11667540 is an abundant number, since it is smaller than the sum of its proper divisors (21229548).

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

11667540 is a wasteful number, since it uses less digits than its factorization.

11667540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368 (or 1366 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 11667540 is about 3415.7780958370. The cubic root of 11667540 is about 226.8087296672.

The spelling of 11667540 in words is "eleven million, six hundred sixty-seven thousand, five hundred forty".