399739230 has 192 divisors, whose sum is σ = 1183942656. Its totient is φ = 93508800.

The previous prime is 399739213. The next prime is 399739247. The reversal of 399739230 is 32937993.

It is an interprime number because it is at equal distance from previous prime (399739213) and next prime (399739247).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5630095 + ... + 5630165.

It is an arithmetic number, because the mean of its divisors is an integer number (6166368).

Almost surely, 2^399739230 is an apocalyptic number.

399739230 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 399739230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591971328).

399739230 is an abundant number, since it is smaller than the sum of its proper divisors (784203426).

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

399739230 is a wasteful number, since it uses less digits than its factorization.

399739230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 275562, while the sum is 45.

The square root of 399739230 is about 19993.4796871380. The cubic root of 399739230 is about 736.6461507723.

The spelling of 399739230 in words is "three hundred ninety-nine million, seven hundred thirty-nine thousand, two hundred thirty".