40391842 has 8 divisors (see below), whose sum is σ = 61065216. Its totient is φ = 20036772.

The previous prime is 40391839. The next prime is 40391843. The reversal of 40391842 is 24819304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40391843) 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, 79258 + ... + 79765.

It is an arithmetic number, because the mean of its divisors is an integer number (7633152).

Almost surely, 2^40391842 is an apocalyptic number.

40391842 is a deficient number, since it is larger than the sum of its proper divisors (20673374).

40391842 is a wasteful number, since it uses less digits than its factorization.

40391842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159152.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 40391842 is about 6355.4576546461. The cubic root of 40391842 is about 343.1082965161.

The spelling of 40391842 in words is "forty million, three hundred ninety-one thousand, eight hundred forty-two".