40391250 has 40 divisors (see below), whose sum is σ = 100955184. Its totient is φ = 10770000.

The previous prime is 40391231. The next prime is 40391257. The reversal of 40391250 is 5219304.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40391250.

It is not an unprimeable number, because it can be changed into a prime (40391257) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1636 + ... + 9135.

Almost surely, 2^40391250 is an apocalyptic number.

40391250 is an abundant number, since it is smaller than the sum of its proper divisors (60563934).

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

40391250 is a wasteful number, since it uses less digits than its factorization.

40391250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10796 (or 10781 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 40391250 is about 6355.4110803315. The cubic root of 40391250 is about 343.1066202609.

The spelling of 40391250 in words is "forty million, three hundred ninety-one thousand, two hundred fifty".