40400523 has 12 divisors (see below), whose sum is σ = 58893120. Its totient is φ = 26685936.

The previous prime is 40400519. The next prime is 40400527. The reversal of 40400523 is 32500404.

It is a happy number.

40400523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40400519) and next prime (40400527).

It is not a de Polignac number, because 40400523 - 2² = 40400519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40400496 and 40400505.

It is not an unprimeable number, because it can be changed into a prime (40400527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19611 + ... + 21572.

It is an arithmetic number, because the mean of its divisors is an integer number (4907760).

Almost surely, 2^40400523 is an apocalyptic number.

40400523 is a deficient number, since it is larger than the sum of its proper divisors (18492597).

40400523 is a wasteful number, since it uses less digits than its factorization.

40400523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41298 (or 41295 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 40400523 is about 6356.1405742793. The cubic root of 40400523 is about 343.1328749922.

Adding to 40400523 its reverse (32500404), we get a palindrome (72900927).

The spelling of 40400523 in words is "forty million, four hundred thousand, five hundred twenty-three".