40604491 has 4 divisors (see below), whose sum is σ = 41023192. Its totient is φ = 40185792.

The previous prime is 40604477. The next prime is 40604497. The reversal of 40604491 is 19440604.

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 40604491 - 2⁷ = 40604363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40604497) 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, 209205 + ... + 209398.

It is an arithmetic number, because the mean of its divisors is an integer number (10255798).

Almost surely, 2^40604491 is an apocalyptic number.

40604491 is a deficient number, since it is larger than the sum of its proper divisors (418701).

40604491 is an equidigital number, since it uses as much as digits as its factorization.

40604491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418700.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 40604491 is about 6372.1653305607. The cubic root of 40604491 is about 343.7093582364.

The spelling of 40604491 in words is "forty million, six hundred four thousand, four hundred ninety-one".