399997470 has 16 divisors (see below), whose sum is σ = 959994000. Its totient is φ = 106665984.

The previous prime is 399997469. The next prime is 399997483. The reversal of 399997470 is 74799993.

It is a self number, because there is not a number n which added to its sum of digits gives 399997470.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6666595 + ... + 6666654.

It is an arithmetic number, because the mean of its divisors is an integer number (59999625).

Almost surely, 2^399997470 is an apocalyptic number.

399997470 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

399997470 is an abundant number, since it is smaller than the sum of its proper divisors (559996530).

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

399997470 is a wasteful number, since it uses less digits than its factorization.

399997470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13333259.

The product of its (nonzero) digits is 3857868, while the sum is 57.

The square root of 399997470 is about 19999.9367499000. The cubic root of 399997470 is about 736.8047462915.

The spelling of 399997470 in words is "three hundred ninety-nine million, nine hundred ninety-seven thousand, four hundred seventy".