40278432 has 24 divisors (see below), whose sum is σ = 105731136. Its totient is φ = 13426112.

The previous prime is 40278421. The next prime is 40278437. The reversal of 40278432 is 23487204.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40278432.

It is not an unprimeable number, because it can be changed into a prime (40278437) 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 3 ways as a sum of consecutive naturals, for example, 209688 + ... + 209879.

It is an arithmetic number, because the mean of its divisors is an integer number (4405464).

Almost surely, 2^40278432 is an apocalyptic number.

It is an amenable number.

40278432 is an abundant number, since it is smaller than the sum of its proper divisors (65452704).

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

40278432 is a wasteful number, since it uses less digits than its factorization.

40278432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419580 (or 419572 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 40278432 is about 6346.5291301624. The cubic root of 40278432 is about 342.7868752824.

The spelling of 40278432 in words is "forty million, two hundred seventy-eight thousand, four hundred thirty-two".