399743995 has 8 divisors (see below), whose sum is σ = 548220384. Its totient is φ = 274110144.

The previous prime is 399743951. The next prime is 399743999. The reversal of 399743995 is 599347993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 399743995 - 2¹³ = 399735803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399743999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5710594 + ... + 5710663.

It is an arithmetic number, because the mean of its divisors is an integer number (68527548).

Almost surely, 2^399743995 is an apocalyptic number.

399743995 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

399743995 is a deficient number, since it is larger than the sum of its proper divisors (148476389).

399743995 is a wasteful number, since it uses less digits than its factorization.

399743995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11421269.

The product of its digits is 8266860, while the sum is 58.

The square root of 399743995 is about 19993.5988506322. The cubic root of 399743995 is about 736.6490777680.

The spelling of 399743995 in words is "three hundred ninety-nine million, seven hundred forty-three thousand, nine hundred ninety-five".