40490923 has 24 divisors (see below), whose sum is σ = 48098304. Its totient is φ = 33782400.

The previous prime is 40490917. The next prime is 40490927. The reversal of 40490923 is 32909404.

It is a de Polignac number, because none of the positive numbers 2^k-40490923 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40490927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149278 + ... + 149548.

It is an arithmetic number, because the mean of its divisors is an integer number (2004096).

Almost surely, 2^40490923 is an apocalyptic number.

40490923 is a deficient number, since it is larger than the sum of its proper divisors (7607381).

40490923 is a wasteful number, since it uses less digits than its factorization.

40490923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 40490923 is about 6363.2478342431. The cubic root of 40490923 is about 343.3886151178.

The spelling of 40490923 in words is "forty million, four hundred ninety thousand, nine hundred twenty-three".