40380040 has 16 divisors (see below), whose sum is σ = 90855180. Its totient is φ = 16152000.

The previous prime is 40380037. The next prime is 40380047. The reversal of 40380040 is 4008304.

It can be written as a sum of positive squares in 2 ways, for example, as 40373316 + 6724 = 6354^2 + 82^2 .

It is not an unprimeable number, because it can be changed into a prime (40380047) 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, 504711 + ... + 504790.

Almost surely, 2^40380040 is an apocalyptic number.

40380040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40380040 is an abundant number, since it is smaller than the sum of its proper divisors (50475140).

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

40380040 is a wasteful number, since it uses less digits than its factorization.

40380040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009512 (or 1009508 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 40380040 is about 6354.5290934891. The cubic root of 40380040 is about 343.0748759179.

Adding to 40380040 its reverse (4008304), we get a palindrome (44388344).

The spelling of 40380040 in words is "forty million, three hundred eighty thousand, forty".