40278144 has 32 divisors (see below), whose sum is σ = 106989840. Its totient is φ = 13425920.

The previous prime is 40278131. The next prime is 40278149. The reversal of 40278144 is 44187204.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (40278149) 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, 52062 + ... + 52829.

Almost surely, 2^40278144 is an apocalyptic number.

It is an amenable number.

40278144 is an abundant number, since it is smaller than the sum of its proper divisors (66711696).

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

40278144 is a wasteful number, since it uses less digits than its factorization.

40278144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104908 (or 104896 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 40278144 is about 6346.5064405545. The cubic root of 40278144 is about 342.7860582789.

The spelling of 40278144 in words is "forty million, two hundred seventy-eight thousand, one hundred forty-four".