11649870 has 24 divisors (see below), whose sum is σ = 30289896. Its totient is φ = 3106608.

The previous prime is 11649853. The next prime is 11649881. The reversal of 11649870 is 7894611.

11649870 is a `hidden beast` number, since 1 + 1 + 649 + 8 + 7 + 0 = 666.

11649870 is nontrivially palindromic in base 4.

11649870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64632 + ... + 64811.

It is an arithmetic number, because the mean of its divisors is an integer number (1262079).

Almost surely, 2^11649870 is an apocalyptic number.

11649870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11649870 is an abundant number, since it is smaller than the sum of its proper divisors (18640026).

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

11649870 is a wasteful number, since it uses less digits than its factorization.

11649870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129456 (or 129453 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 11649870 is about 3413.1905894632. The cubic root of 11649870 is about 226.6941743817.

The spelling of 11649870 in words is "eleven million, six hundred forty-nine thousand, eight hundred seventy".