449729280 has 864 divisors, whose sum is σ = 2154539520. Its totient is φ = 86261760.

The previous prime is 449729263. The next prime is 449729299. The reversal of 449729280 is 82927944.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 34594554 + ... + 34594566.

It is an arithmetic number, because the mean of its divisors is an integer number (2493680).

Almost surely, 2^449729280 is an apocalyptic number.

449729280 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 449729280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1077269760).

449729280 is an abundant number, since it is smaller than the sum of its proper divisors (1704810240).

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

449729280 is a wasteful number, since it uses less digits than its factorization.

449729280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 449729280 is about 21206.8215440221. The cubic root of 449729280 is about 766.1557309823.

The spelling of 449729280 in words is "four hundred forty-nine million, seven hundred twenty-nine thousand, two hundred eighty".