40384040 has 16 divisors (see below), whose sum is σ = 90864180. Its totient is φ = 16153600.

The previous prime is 40384033. The next prime is 40384051. The reversal of 40384040 is 4048304.

It can be written as a sum of positive squares in 2 ways, for example, as 37136836 + 3247204 = 6094^2 + 1802^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40383997 and 40384015.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504761 + ... + 504840.

Almost surely, 2^40384040 is an apocalyptic number.

40384040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40384040 is an abundant number, since it is smaller than the sum of its proper divisors (50480140).

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

40384040 is a wasteful number, since it uses less digits than its factorization.

40384040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009612 (or 1009608 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 40384040 is about 6354.8438218417. The cubic root of 40384040 is about 343.0862037438.

The spelling of 40384040 in words is "forty million, three hundred eighty-four thousand, forty".