399975000 has 96 divisors (see below), whose sum is σ = 1250076240. Its totient is φ = 106640000.

The previous prime is 399974999. The next prime is 399975013. The reversal of 399975000 is 579993.

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 23 ways as a sum of consecutive naturals, for example, 72334 + ... + 77666.

Almost surely, 2^399975000 is an apocalyptic number.

399975000 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 399975000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (625038120).

399975000 is an abundant number, since it is smaller than the sum of its proper divisors (850101240).

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

399975000 is an equidigital number, since it uses as much as digits as its factorization.

399975000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5367 (or 5343 counting only the distinct ones).

The product of its (nonzero) digits is 76545, while the sum is 42.

The square root of 399975000 is about 19999.3749902341. The cubic root of 399975000 is about 736.7909492770.

The spelling of 399975000 in words is "three hundred ninety-nine million, nine hundred seventy-five thousand".