40373921 has 8 divisors (see below), whose sum is σ = 46263360. Its totient is φ = 34514928.

The previous prime is 40373909. The next prime is 40373923. The reversal of 40373921 is 12937304.

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

It is not a de Polignac number, because 40373921 - 2⁶ = 40373857 is a prime.

It is a super-3 number, since 3×40373921³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40373923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4691 + ... + 10136.

It is an arithmetic number, because the mean of its divisors is an integer number (5782920).

Almost surely, 2^40373921 is an apocalyptic number.

It is an amenable number.

40373921 is a deficient number, since it is larger than the sum of its proper divisors (5889439).

40373921 is a wasteful number, since it uses less digits than its factorization.

40373921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15223.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 40373921 is about 6354.0476076278. The cubic root of 40373921 is about 343.0575457286.

The spelling of 40373921 in words is "forty million, three hundred seventy-three thousand, nine hundred twenty-one".