40074438 has 32 divisors (see below), whose sum is σ = 81994752. Its totient is φ = 13053600.

The previous prime is 40074431. The next prime is 40074443. The reversal of 40074438 is 83447004.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40074431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81373 + ... + 81863.

It is an arithmetic number, because the mean of its divisors is an integer number (2562336).

Almost surely, 2^40074438 is an apocalyptic number.

40074438 is an abundant number, since it is smaller than the sum of its proper divisors (41920314).

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

40074438 is a wasteful number, since it uses less digits than its factorization.

40074438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780.

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

The square root of 40074438 is about 6330.4374256445. The cubic root of 40074438 is about 342.2072031898.

The spelling of 40074438 in words is "forty million, seventy-four thousand, four hundred thirty-eight".