399383070 has 64 divisors (see below), whose sum is σ = 994705920. Its totient is φ = 102505088.

The previous prime is 399383053. The next prime is 399383077. The reversal of 399383070 is 70383993.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399383077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405799 + ... + 406781.

It is an arithmetic number, because the mean of its divisors is an integer number (15542280).

Almost surely, 2^399383070 is an apocalyptic number.

399383070 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 399383070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497352960).

399383070 is an abundant number, since it is smaller than the sum of its proper divisors (595322850).

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

399383070 is a wasteful number, since it uses less digits than its factorization.

399383070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 399383070 is about 19984.5707984935. The cubic root of 399383070 is about 736.4273065590.

The spelling of 399383070 in words is "three hundred ninety-nine million, three hundred eighty-three thousand, seventy".