399892038 has 64 divisors (see below), whose sum is σ = 1004505600. Its totient is φ = 105458976.

The previous prime is 399891977. The next prime is 399892039. The reversal of 399892038 is 830298993.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399892039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19281 + ... + 34227.

It is an arithmetic number, because the mean of its divisors is an integer number (15695400).

Almost surely, 2^399892038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399892038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (502252800).

399892038 is an abundant number, since it is smaller than the sum of its proper divisors (604613562).

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

399892038 is a wasteful number, since it uses less digits than its factorization.

399892038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14986 (or 14972 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 399892038 is about 19997.3007678536. The cubic root of 399892038 is about 736.7400045285.

The spelling of 399892038 in words is "three hundred ninety-nine million, eight hundred ninety-two thousand, thirty-eight".