40388380 has 12 divisors (see below), whose sum is σ = 84815640. Its totient is φ = 16155344.

The previous prime is 40388339. The next prime is 40388389. The reversal of 40388380 is 8388304.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40388389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1009690 + ... + 1009729.

It is an arithmetic number, because the mean of its divisors is an integer number (7067970).

Almost surely, 2^40388380 is an apocalyptic number.

It is an amenable number.

40388380 is an abundant number, since it is smaller than the sum of its proper divisors (44427260).

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

40388380 is a wasteful number, since it uses less digits than its factorization.

40388380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019428 (or 2019426 counting only the distinct ones).

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

The square root of 40388380 is about 6355.1852844744. The cubic root of 40388380 is about 343.0984935889.

The spelling of 40388380 in words is "forty million, three hundred eighty-eight thousand, three hundred eighty".