11649816 has 48 divisors (see below), whose sum is σ = 31730400. Its totient is φ = 3861312.

The previous prime is 11649809. The next prime is 11649817. The reversal of 11649816 is 61894611.

It is a happy number.

11649816 is a `hidden beast` number, since 1 + 1 + 649 + 8 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11649817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16870 + ... + 17546.

It is an arithmetic number, because the mean of its divisors is an integer number (661050).

Almost surely, 2^11649816 is an apocalyptic number.

It is an amenable number.

11649816 is an abundant number, since it is smaller than the sum of its proper divisors (20080584).

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

11649816 is a wasteful number, since it uses less digits than its factorization.

11649816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928 (or 921 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 11649816 is about 3413.1826789669. The cubic root of 11649816 is about 226.6938241202.

The spelling of 11649816 in words is "eleven million, six hundred forty-nine thousand, eight hundred sixteen".