11877678 has 40 divisors (see below), whose sum is σ = 26841672. Its totient is φ = 3925584.

The previous prime is 11877667. The next prime is 11877727. The reversal of 11877678 is 87677811.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25201 + ... + 25667.

Almost surely, 2^11877678 is an apocalyptic number.

11877678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11877678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13420836).

11877678 is an abundant number, since it is smaller than the sum of its proper divisors (14963994).

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

11877678 is a wasteful number, since it uses less digits than its factorization.

11877678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 629 counting only the distinct ones).

The product of its digits is 131712, while the sum is 45.

The square root of 11877678 is about 3446.4007311977. The cubic root of 11877678 is about 228.1622805901.

The spelling of 11877678 in words is "eleven million, eight hundred seventy-seven thousand, six hundred seventy-eight".