399465528 has 192 divisors, whose sum is σ = 1286503680. Its totient is φ = 101122560.

The previous prime is 399465499. The next prime is 399465533. The reversal of 399465528 is 825564993.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 873876 + ... + 874332.

It is an arithmetic number, because the mean of its divisors is an integer number (6700540).

Almost surely, 2^399465528 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 399465528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (643251840).

399465528 is an abundant number, since it is smaller than the sum of its proper divisors (887038152).

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

399465528 is a wasteful number, since it uses less digits than its factorization.

399465528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 523 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 51.

The square root of 399465528 is about 19986.6337335730. The cubic root of 399465528 is about 736.4779848415.

It can be divided in two parts, 399465 and 528, that added together give a palindrome (399993).

The spelling of 399465528 in words is "three hundred ninety-nine million, four hundred sixty-five thousand, five hundred twenty-eight".