40233649 has 3 divisors (see below), whose sum is σ = 40239993. Its totient is φ = 40227306.

The previous prime is 40233631. The next prime is 40233667. The reversal of 40233649 is 94633204.

The square root of 40233649 is 6343.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (40233631) and next prime (40233667).

It is not a de Polignac number, because 40233649 - 2⁷ = 40233521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40233649.

It is not an unprimeable number, because it can be changed into a prime (40233619) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3172 + ... + 9514.

It is an arithmetic number, because the mean of its divisors is an integer number (13413331).

Almost surely, 2^40233649 is an apocalyptic number.

40233649 is the 6343-rd square number.

40233649 is the 3172-nd centered octagonal number.

It is an amenable number.

40233649 is a deficient number, since it is larger than the sum of its proper divisors (6344).

40233649 is an frugal number, since it uses more digits than its factorization.

40233649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12686 (or 6343 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The cubic root of 40233649 is about 342.6597872714.

The spelling of 40233649 in words is "forty million, two hundred thirty-three thousand, six hundred forty-nine".