11887434 has 48 divisors (see below), whose sum is σ = 28507752. Its totient is φ = 3556224.

The previous prime is 11887433. The next prime is 11887439. The reversal of 11887434 is 43478811.

11887434 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 4 ways, for example, as 11881809 + 5625 = 3447^2 + 75^2 .

It is a super-2 number, since 2×11887434² = 282622174208712, which contains 22 as substring.

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 Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11887433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7972 + ... + 9344.

Almost surely, 2^11887434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11887434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14253876).

11887434 is an abundant number, since it is smaller than the sum of its proper divisors (16620318).

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

11887434 is a wasteful number, since it uses less digits than its factorization.

11887434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431 (or 1428 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 11887434 is about 3447.8158303483. The cubic root of 11887434 is about 228.2247322478.

It can be divided in two parts, 11887 and 434, that added together give a palindrome (12321).

The spelling of 11887434 in words is "eleven million, eight hundred eighty-seven thousand, four hundred thirty-four".