40028623 has 4 divisors (see below), whose sum is σ = 40425048. Its totient is φ = 39632200.

The previous prime is 40028617. The next prime is 40028629. The reversal of 40028623 is 32682004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40028617) and next prime (40028629).

It is a cyclic number.

It is not a de Polignac number, because 40028623 - 2⁹ = 40028111 is a prime.

It is a super-2 number, since 2×40028623² = 3204581318552258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40028629) 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, 198061 + ... + 198262.

It is an arithmetic number, because the mean of its divisors is an integer number (10106262).

Almost surely, 2^40028623 is an apocalyptic number.

40028623 is a deficient number, since it is larger than the sum of its proper divisors (396425).

40028623 is a wasteful number, since it uses less digits than its factorization.

40028623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396424.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 40028623 is about 6326.8177625090. The cubic root of 40028623 is about 342.0767442881.

The spelling of 40028623 in words is "forty million, twenty-eight thousand, six hundred twenty-three".