40229993 has 4 divisors (see below), whose sum is σ = 40245060. Its totient is φ = 40214928.

The previous prime is 40229963. The next prime is 40230031. The reversal of 40229993 is 39992204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16386304 + 23843689 = 4048^2 + 4883^2 .

It is a cyclic number.

It is not a de Polignac number, because 40229993 - 2¹⁶ = 40164457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40229923) 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, 2330 + ... + 9267.

It is an arithmetic number, because the mean of its divisors is an integer number (10061265).

Almost surely, 2^40229993 is an apocalyptic number.

It is an amenable number.

40229993 is a deficient number, since it is larger than the sum of its proper divisors (15067).

40229993 is a wasteful number, since it uses less digits than its factorization.

40229993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15066.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 40229993 is about 6342.7118017454. The cubic root of 40229993 is about 342.6494078820.

The spelling of 40229993 in words is "forty million, two hundred twenty-nine thousand, nine hundred ninety-three".