11649540 has 48 divisors (see below), whose sum is σ = 37279872. Its totient is φ = 2662656.

The previous prime is 11649529. The next prime is 11649551. The reversal of 11649540 is 4594611.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11649529) and next prime (11649551).

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 = 11649498 and 11649507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13449 + ... + 14288.

It is an arithmetic number, because the mean of its divisors is an integer number (776664).

Almost surely, 2^11649540 is an apocalyptic number.

11649540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11649540 is an abundant number, since it is smaller than the sum of its proper divisors (25630332).

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

11649540 is a wasteful number, since it uses less digits than its factorization.

11649540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27756 (or 27754 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 11649540 is about 3413.1422472555. The cubic root of 11649540 is about 226.6920338776.

The spelling of 11649540 in words is "eleven million, six hundred forty-nine thousand, five hundred forty".