399710481 has 8 divisors (see below), whose sum is σ = 538935840. Its totient is φ = 263479392.

The previous prime is 399710473. The next prime is 399710501. The reversal of 399710481 is 184017993.

It is a happy number.

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

It is not a de Polignac number, because 399710481 - 2³ = 399710473 is a prime.

It is a super-2 number, since 2×399710481² = 319536937242502722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399710431) 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, 748255 + ... + 748788.

It is an arithmetic number, because the mean of its divisors is an integer number (67366980).

Almost surely, 2^399710481 is an apocalyptic number.

It is an amenable number.

399710481 is a deficient number, since it is larger than the sum of its proper divisors (139225359).

399710481 is a wasteful number, since it uses less digits than its factorization.

399710481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497135.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 399710481 is about 19992.7607148188. The cubic root of 399710481 is about 736.6284906360.

The spelling of 399710481 in words is "three hundred ninety-nine million, seven hundred ten thousand, four hundred eighty-one".