399087000 has 320 divisors, whose sum is σ = 1506304800. Its totient is φ = 97977600.

The previous prime is 399086977. The next prime is 399087037. The reversal of 399087000 is 780993.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1052811 + ... + 1053189.

Almost surely, 2^399087000 is an apocalyptic number.

399087000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399087000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753152400).

399087000 is an abundant number, since it is smaller than the sum of its proper divisors (1107217800).

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

399087000 is a wasteful number, since it uses less digits than its factorization.

399087000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 399087000 is about 19977.1619605989. The cubic root of 399087000 is about 736.2452858802.

The spelling of 399087000 in words is "three hundred ninety-nine million, eighty-seven thousand".