40023937 has 4 divisors (see below), whose sum is σ = 42130480. Its totient is φ = 37917396.

The previous prime is 40023917. The next prime is 40023941. The reversal of 40023937 is 73932004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40023937 - 2¹⁵ = 39991169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40023917) 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, 1053243 + ... + 1053280.

It is an arithmetic number, because the mean of its divisors is an integer number (10532620).

Almost surely, 2^40023937 is an apocalyptic number.

It is an amenable number.

40023937 is a deficient number, since it is larger than the sum of its proper divisors (2106543).

40023937 is a wasteful number, since it uses less digits than its factorization.

40023937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106542.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 40023937 is about 6326.4474233174. The cubic root of 40023937 is about 342.0633952222.

The spelling of 40023937 in words is "forty million, twenty-three thousand, nine hundred thirty-seven".