40001380 has 24 divisors (see below), whose sum is σ = 84409920. Its totient is φ = 15923040.

The previous prime is 40001359. The next prime is 40001387. The reversal of 40001380 is 8310004.

40001380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40001380² = 3200220803808800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40001387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520 + ... + 8959.

It is an arithmetic number, because the mean of its divisors is an integer number (3517080).

Almost surely, 2^40001380 is an apocalyptic number.

It is an amenable number.

40001380 is an abundant number, since it is smaller than the sum of its proper divisors (44408540).

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

40001380 is a wasteful number, since it uses less digits than its factorization.

40001380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9699 (or 9697 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 40001380 is about 6324.6644179751. The cubic root of 40001380 is about 341.9991222348. Note that the first 3 decimals are identical.

Adding to 40001380 its reverse (8310004), we get a palindrome (48311384).

The spelling of 40001380 in words is "forty million, one thousand, three hundred eighty".