40347427 has 4 divisors (see below), whose sum is σ = 41437936. Its totient is φ = 39256920.

The previous prime is 40347407. The next prime is 40347473. The reversal of 40347427 is 72474304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40347427 - 2⁷ = 40347299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40347407) 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, 545199 + ... + 545272.

It is an arithmetic number, because the mean of its divisors is an integer number (10359484).

Almost surely, 2^40347427 is an apocalyptic number.

40347427 is a deficient number, since it is larger than the sum of its proper divisors (1090509).

40347427 is a wasteful number, since it uses less digits than its factorization.

40347427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090508.

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 40347427 is about 6351.9624526598. The cubic root of 40347427 is about 342.9824893950.

The spelling of 40347427 in words is "forty million, three hundred forty-seven thousand, four hundred twenty-seven".