40393867 has 4 divisors (see below), whose sum is σ = 42519880. Its totient is φ = 38267856.

The previous prime is 40393841. The next prime is 40393877. The reversal of 40393867 is 76839304.

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 40393867 - 2⁷ = 40393739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40393877) 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, 1062978 + ... + 1063015.

It is an arithmetic number, because the mean of its divisors is an integer number (10629970).

Almost surely, 2^40393867 is an apocalyptic number.

40393867 is a deficient number, since it is larger than the sum of its proper divisors (2126013).

40393867 is a wasteful number, since it uses less digits than its factorization.

40393867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126012.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 40393867 is about 6355.6169645440. The cubic root of 40393867 is about 343.1140302044.

The spelling of 40393867 in words is "forty million, three hundred ninety-three thousand, eight hundred sixty-seven".