40902023 has 4 divisors (see below), whose sum is σ = 41057808. Its totient is φ = 40746240.

The previous prime is 40902011. The next prime is 40902047. The reversal of 40902023 is 32020904.

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 40902023 - 2¹⁰ = 40900999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40901986 and 40902004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40902053) 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, 77498 + ... + 78023.

It is an arithmetic number, because the mean of its divisors is an integer number (10264452).

Almost surely, 2^40902023 is an apocalyptic number.

40902023 is a deficient number, since it is larger than the sum of its proper divisors (155785).

40902023 is a wasteful number, since it uses less digits than its factorization.

40902023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155784.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40902023 is about 6395.4689429314. The cubic root of 40902023 is about 344.5468334258.

Adding to 40902023 its reverse (32020904), we get a palindrome (72922927).

The spelling of 40902023 in words is "forty million, nine hundred two thousand, twenty-three".