40890079 has 4 divisors (see below), whose sum is σ = 41887440. Its totient is φ = 39892720.

The previous prime is 40890077. The next prime is 40890089. The reversal of 40890079 is 97009804.

It is a happy number.

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 40890079 - 2¹ = 40890077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40890077) 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, 498619 + ... + 498700.

It is an arithmetic number, because the mean of its divisors is an integer number (10471860).

Almost surely, 2^40890079 is an apocalyptic number.

40890079 is a deficient number, since it is larger than the sum of its proper divisors (997361).

40890079 is an equidigital number, since it uses as much as digits as its factorization.

40890079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997360.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 40890079 is about 6394.5350886519. The cubic root of 40890079 is about 344.5132925582.

The spelling of 40890079 in words is "forty million, eight hundred ninety thousand, seventy-nine".