399999948 has 12 divisors (see below), whose sum is σ = 933333240. Its totient is φ = 133333312.

The previous prime is 399999947. The next prime is 399999949. The reversal of 399999948 is 849999993.

It is an interprime number because it is at equal distance from previous prime (399999947) and next prime (399999949).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (399999947) 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 3 ways as a sum of consecutive naturals, for example, 16666653 + ... + 16666676.

It is an arithmetic number, because the mean of its divisors is an integer number (77777770).

Almost surely, 2^399999948 is an apocalyptic number.

It is an amenable number.

399999948 is an abundant number, since it is smaller than the sum of its proper divisors (533333292).

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

399999948 is a wasteful number, since it uses less digits than its factorization.

399999948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333336 (or 33333334 counting only the distinct ones).

The product of its digits is 51018336, while the sum is 69.

The square root of 399999948 is about 19999.9987000000. The cubic root of 399999948 is about 736.8062677998.

The spelling of 399999948 in words is "three hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty-eight".