40278843 has 24 divisors (see below), whose sum is σ = 65595600. Its totient is φ = 24409440.

The previous prime is 40278809. The next prime is 40278853. The reversal of 40278843 is 34887204.

It is not a de Polignac number, because 40278843 - 2¹² = 40274747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40278798 and 40278807.

It is not an unprimeable number, because it can be changed into a prime (40278853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2898 + ... + 9431.

It is an arithmetic number, because the mean of its divisors is an integer number (2733150).

Almost surely, 2^40278843 is an apocalyptic number.

40278843 is a deficient number, since it is larger than the sum of its proper divisors (25316757).

40278843 is a wasteful number, since it uses less digits than its factorization.

40278843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12360 (or 12343 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 40278843 is about 6346.5615099832. The cubic root of 40278843 is about 342.7880412077.

The spelling of 40278843 in words is "forty million, two hundred seventy-eight thousand, eight hundred forty-three".