399485500 has 48 divisors (see below), whose sum is σ = 881060544. Its totient is φ = 158222400.

The previous prime is 399485497. The next prime is 399485549. The reversal of 399485500 is 5584993.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47622 + ... + 55378.

It is an arithmetic number, because the mean of its divisors is an integer number (18355428).

Almost surely, 2^399485500 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 399485500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440530272).

399485500 is an abundant number, since it is smaller than the sum of its proper divisors (481575044).

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

399485500 is a wasteful number, since it uses less digits than its factorization.

399485500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7879 (or 7867 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 399485500 is about 19987.1333612402. The cubic root of 399485500 is about 736.4902584856.

The spelling of 399485500 in words is "three hundred ninety-nine million, four hundred eighty-five thousand, five hundred".