40890423 has 32 divisors (see below), whose sum is σ = 67405824. Its totient is φ = 21514752.

The previous prime is 40890419. The next prime is 40890431. The reversal of 40890423 is 32409804.

It is a happy number.

It is not a de Polignac number, because 40890423 - 2² = 40890419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40890433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15561 + ... + 17997.

It is an arithmetic number, because the mean of its divisors is an integer number (2106432).

Almost surely, 2^40890423 is an apocalyptic number.

40890423 is a deficient number, since it is larger than the sum of its proper divisors (26515401).

40890423 is a wasteful number, since it uses less digits than its factorization.

40890423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 40890423 is about 6394.5619865633. The cubic root of 40890423 is about 344.5142586625.

The spelling of 40890423 in words is "forty million, eight hundred ninety thousand, four hundred twenty-three".