40380388 has 12 divisors (see below), whose sum is σ = 71634220. Its totient is φ = 19913472.

The previous prime is 40380371. The next prime is 40380391. The reversal of 40380388 is 88308304.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30382144 + 9998244 = 5512^2 + 3162^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68853 + ... + 69436.

Almost surely, 2^40380388 is an apocalyptic number.

It is an amenable number.

40380388 is a deficient number, since it is larger than the sum of its proper divisors (31253832).

40380388 is a wasteful number, since it uses less digits than its factorization.

40380388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138366 (or 138364 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 40380388 is about 6354.5564754749. The cubic root of 40380388 is about 343.0758614685.

The spelling of 40380388 in words is "forty million, three hundred eighty thousand, three hundred eighty-eight".