40388 has 12 divisors (see below), whose sum is σ = 73920. Its totient is φ = 19272.

The previous prime is 40387. The next prime is 40423. The reversal of 40388 is 88304.

40388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (40387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128 + ... + 311.

It is an arithmetic number, because the mean of its divisors is an integer number (6160).

2⁴⁰³⁸⁸ is an apocalyptic number.

It is an amenable number.

40388 is a deficient number, since it is larger than the sum of its proper divisors (33532).

40388 is a wasteful number, since it uses less digits than its factorization.

40388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 40388 is about 200.9676590897. The cubic root of 40388 is about 34.3097417555.

The spelling of 40388 in words is "forty thousand, three hundred eighty-eight".