11878388 has 6 divisors (see below), whose sum is σ = 20787186. Its totient is φ = 5939192.

The previous prime is 11878387. The next prime is 11878403. The reversal of 11878388 is 88387811.

It can be written as a sum of positive squares in only one way, i.e., 6012304 + 5866084 = 2452^2 + 2422^2 .

It is a super-2 number, since 2×11878388² = 282192202957088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11878381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1484795 + ... + 1484802.

It is an arithmetic number, because the mean of its divisors is an integer number (3464531).

Almost surely, 2^11878388 is an apocalyptic number.

It is an amenable number.

11878388 is a deficient number, since it is larger than the sum of its proper divisors (8908798).

11878388 is a wasteful number, since it uses less digits than its factorization.

11878388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969601 (or 2969599 counting only the distinct ones).

The product of its digits is 86016, while the sum is 44.

The square root of 11878388 is about 3446.5037356718. The cubic root of 11878388 is about 228.1668267085.

The spelling of 11878388 in words is "eleven million, eight hundred seventy-eight thousand, three hundred eighty-eight".