40115388 has 24 divisors (see below), whose sum is σ = 95780608. Its totient is φ = 13060656.

The previous prime is 40115371. The next prime is 40115389. The reversal of 40115388 is 88351104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40115389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38356 + ... + 39387.

Almost surely, 2^40115388 is an apocalyptic number.

It is an amenable number.

40115388 is an abundant number, since it is smaller than the sum of its proper divisors (55665220).

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

40115388 is a wasteful number, since it uses less digits than its factorization.

40115388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77793 (or 77791 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 40115388 is about 6333.6709734561. The cubic root of 40115388 is about 342.3237248030.

The spelling of 40115388 in words is "forty million, one hundred fifteen thousand, three hundred eighty-eight".