40255040 has 56 divisors (see below), whose sum is σ = 109557312. Its totient is φ = 13800960.

The previous prime is 40255027. The next prime is 40255049. The reversal of 40255040 is 4055204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (40255049) 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 7 ways as a sum of consecutive naturals, for example, 6746 + ... + 11225.

Almost surely, 2^40255040 is an apocalyptic number.

40255040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40255040 is an abundant number, since it is smaller than the sum of its proper divisors (69302272).

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

40255040 is a wasteful number, since it uses less digits than its factorization.

40255040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17995 (or 17985 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 40255040 is about 6344.6859654360. The cubic root of 40255040 is about 342.7205037534.

The spelling of 40255040 in words is "forty million, two hundred fifty-five thousand, forty".