40380640 has 48 divisors (see below), whose sum is σ = 99556128. Its totient is φ = 15448576.

The previous prime is 40380601. The next prime is 40380649. The reversal of 40380640 is 4608304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40380649) 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, 1807 + ... + 9166.

It is an arithmetic number, because the mean of its divisors is an integer number (2074086).

Almost surely, 2^40380640 is an apocalyptic number.

40380640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40380640 is an abundant number, since it is smaller than the sum of its proper divisors (59175488).

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

40380640 is a wasteful number, since it uses less digits than its factorization.

40380640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11011 (or 11003 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 40380640 is about 6354.5763037358. The cubic root of 40380640 is about 343.0765751395.

Adding to 40380640 its reverse (4608304), we get a palindrome (44988944).

The spelling of 40380640 in words is "forty million, three hundred eighty thousand, six hundred forty".