399807552 has 56 divisors (see below), whose sum is σ = 1060228512. Its totient is φ = 132966400.

The previous prime is 399807497. The next prime is 399807553. The reversal of 399807552 is 255708993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (399807553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92152 + ... + 96392.

It is an arithmetic number, because the mean of its divisors is an integer number (18932652).

Almost surely, 2^399807552 is an apocalyptic number.

399807552 is a gapful number since it is divisible by the number (32) 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 399807552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (530114256).

399807552 is an abundant number, since it is smaller than the sum of its proper divisors (660420960).

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

399807552 is a wasteful number, since it uses less digits than its factorization.

399807552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4747 (or 4737 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 48.

The square root of 399807552 is about 19995.1882211696. The cubic root of 399807552 is about 736.6881166903.

The spelling of 399807552 in words is "three hundred ninety-nine million, eight hundred seven thousand, five hundred fifty-two".