40243870 has 16 divisors (see below), whose sum is σ = 72608400. Its totient is φ = 16059904.

The previous prime is 40243849. The next prime is 40243871. The reversal of 40243870 is 7834204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40243871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9 + ... + 8971.

It is an arithmetic number, because the mean of its divisors is an integer number (4538025).

Almost surely, 2^40243870 is an apocalyptic number.

40243870 is a deficient number, since it is larger than the sum of its proper divisors (32364530).

40243870 is a wasteful number, since it uses less digits than its factorization.

40243870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9419.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 40243870 is about 6343.8056401501. The cubic root of 40243870 is about 342.6888013698.

The spelling of 40243870 in words is "forty million, two hundred forty-three thousand, eight hundred seventy".