440449551 has 6 divisors (see below), whose sum is σ = 636204920. Its totient is φ = 293633028.

The previous prime is 440449547. The next prime is 440449553. The reversal of 440449551 is 155944044.

It is not a de Polignac number, because 440449551 - 2² = 440449547 is a prime.

It is a super-2 number, since 2×440449551² = 387991613952203202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440449553) 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 5 ways as a sum of consecutive naturals, for example, 24469411 + ... + 24469428.

Almost surely, 2^440449551 is an apocalyptic number.

440449551 is a deficient number, since it is larger than the sum of its proper divisors (195755369).

440449551 is a wasteful number, since it uses less digits than its factorization.

440449551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48938845 (or 48938842 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 440449551 is about 20986.8899792227. The cubic root of 440449551 is about 760.8494374808.

The spelling of 440449551 in words is "four hundred forty million, four hundred forty-nine thousand, five hundred fifty-one".