399448260 has 84 divisors (see below), whose sum is σ = 1257732588. Its totient is φ = 106515648.

The previous prime is 399448223. The next prime is 399448277. The reversal of 399448260 is 62844993.

It can be written as a sum of positive squares in 2 ways, for example, as 215737344 + 183710916 = 14688^2 + 13554^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 882 + ... + 28278.

It is an arithmetic number, because the mean of its divisors is an integer number (14973007).

Almost surely, 2^399448260 is an apocalyptic number.

399448260 is a gapful number since it is divisible by the number (30) 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 399448260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628866294).

399448260 is an abundant number, since it is smaller than the sum of its proper divisors (858284328).

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

399448260 is a wasteful number, since it uses less digits than its factorization.

399448260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27424 (or 27407 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 399448260 is about 19986.2017402007. The cubic root of 399448260 is about 736.4673725907.

The spelling of 399448260 in words is "three hundred ninety-nine million, four hundred forty-eight thousand, two hundred sixty".