11639898 has 24 divisors (see below), whose sum is σ = 25635636. Its totient is φ = 3816000.

The previous prime is 11639897. The next prime is 11639963. The reversal of 11639898 is 89893611.

11639898 is a `hidden beast` number, since 1 + 1 + 639 + 8 + 9 + 8 = 666.

11639898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11512449 + 127449 = 3393^2 + 357^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11639893) 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, 4203 + ... + 6398.

Almost surely, 2^11639898 is an apocalyptic number.

11639898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11639898 is an abundant number, since it is smaller than the sum of its proper divisors (13995738).

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

11639898 is a wasteful number, since it uses less digits than its factorization.

11639898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10670 (or 10667 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 11639898 is about 3411.7294734489. The cubic root of 11639898 is about 226.6294743860.

The spelling of 11639898 in words is "eleven million, six hundred thirty-nine thousand, eight hundred ninety-eight".