440023935649 has 27 divisors (see below), whose sum is σ = 465490719057. Its totient is φ = 415916061000.

The previous prime is 440023935629. The next prime is 440023935653. The reversal of 440023935649 is 946539320044.

It is a happy number.

The square root of 440023935649 is 663343.

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

It is not a de Polignac number, because 440023935649 - 2¹³ = 440023927457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440023935629) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2303790144 + ... + 2303790334.

Almost surely, 2^440023935649 is an apocalyptic number.

440023935649 is the 663343-rd square number.

440023935649 is the 331672-nd centered octagonal number.

It is an amenable number.

440023935649 is a deficient number, since it is larger than the sum of its proper divisors (25466783408).

440023935649 is an frugal number, since it uses more digits than its factorization.

440023935649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 49.

Multiplying 440023935649 by its sum of digits (49), we get a square (21561172846801 = 4643401²).

The spelling of 440023935649 in words is "four hundred forty billion, twenty-three million, nine hundred thirty-five thousand, six hundred forty-nine".