399071500 has 24 divisors (see below), whose sum is σ = 871573248. Its totient is φ = 159628400.

The previous prime is 399071473. The next prime is 399071507. The reversal of 399071500 is 5170993.

It is a super-2 number, since 2×399071500² = 318516124224500000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399071507) 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, 398572 + ... + 399571.

It is an arithmetic number, because the mean of its divisors is an integer number (36315552).

Almost surely, 2^399071500 is an apocalyptic number.

It is an amenable number.

399071500 is an abundant number, since it is smaller than the sum of its proper divisors (472501748).

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

399071500 is a wasteful number, since it uses less digits than its factorization.

399071500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798162 (or 798150 counting only the distinct ones).

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 399071500 is about 19976.7740138392. The cubic root of 399071500 is about 736.2357541660.

The spelling of 399071500 in words is "three hundred ninety-nine million, seventy-one thousand, five hundred".