11397988 has 18 divisors (see below), whose sum is σ = 23203446. Its totient is φ = 4884768.

The previous prime is 11397983. The next prime is 11398003. The reversal of 11397988 is 88979311.

It can be written as a sum of positive squares in only one way, i.e., 5866084 + 5531904 = 2422^2 + 2352^2 .

It is not an unprimeable number, because it can be changed into a prime (11397983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28881 + ... + 29272.

Almost surely, 2^11397988 is an apocalyptic number.

It is an amenable number.

11397988 is an abundant number, since it is smaller than the sum of its proper divisors (11805458).

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

11397988 is a wasteful number, since it uses less digits than its factorization.

11397988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58171 (or 58162 counting only the distinct ones).

The product of its digits is 108864, while the sum is 46.

The square root of 11397988 is about 3376.0906385937. The cubic root of 11397988 is about 225.0484702161.

The spelling of 11397988 in words is "eleven million, three hundred ninety-seven thousand, nine hundred eighty-eight".