449261880 has 64 divisors (see below), whose sum is σ = 1358121600. Its totient is φ = 118884480.

The previous prime is 449261851. The next prime is 449261899. The reversal of 449261880 is 88162944.

It is a super-2 number, since 2×449261880² = 403672473642268800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1431 + ... + 30009.

It is an arithmetic number, because the mean of its divisors is an integer number (21220650).

Almost surely, 2^449261880 is an apocalyptic number.

449261880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 449261880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (679060800).

449261880 is an abundant number, since it is smaller than the sum of its proper divisors (908859720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

449261880 is a wasteful number, since it uses less digits than its factorization.

449261880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28724 (or 28720 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 449261880 is about 21195.7986402966. The cubic root of 449261880 is about 765.8902191633.

The spelling of 449261880 in words is "four hundred forty-nine million, two hundred sixty-one thousand, eight hundred eighty".