449278620 has 96 divisors (see below), whose sum is σ = 1471185408. Its totient is φ = 100300032.

The previous prime is 449278607. The next prime is 449278633. The reversal of 449278620 is 26872944.

It is an interprime number because it is at equal distance from previous prime (449278607) and next prime (449278633).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5622 + ... + 30498.

It is an arithmetic number, because the mean of its divisors is an integer number (15324848).

Almost surely, 2^449278620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 449278620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (735592704).

449278620 is an abundant number, since it is smaller than the sum of its proper divisors (1021906788).

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

449278620 is a wasteful number, since it uses less digits than its factorization.

449278620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24939 (or 24937 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 449278620 is about 21196.1935261971. The cubic root of 449278620 is about 765.8997316872.

The spelling of 449278620 in words is "four hundred forty-nine million, two hundred seventy-eight thousand, six hundred twenty".