399938748 has 48 divisors (see below), whose sum is σ = 1026084864. Its totient is φ = 120234240.

The previous prime is 399938741. The next prime is 399938779. The reversal of 399938748 is 847839993.

It is a junction number, because it is equal to n+sod(n) for n = 399938691 and 399938700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399938741) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4836 + ... + 28692.

It is an arithmetic number, because the mean of its divisors is an integer number (21376768).

Almost surely, 2^399938748 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 399938748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (513042432).

399938748 is an abundant number, since it is smaller than the sum of its proper divisors (626146116).

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

399938748 is a wasteful number, since it uses less digits than its factorization.

399938748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24002 (or 24000 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 60.

The square root of 399938748 is about 19998.4686413735. The cubic root of 399938748 is about 736.7686887587.

The spelling of 399938748 in words is "three hundred ninety-nine million, nine hundred thirty-eight thousand, seven hundred forty-eight".