399106626 has 16 divisors (see below), whose sum is σ = 832918464. Its totient is φ = 127251344.

The previous prime is 399106577. The next prime is 399106627. The reversal of 399106626 is 626601993.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (399106627) 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, 1445901 + ... + 1446176.

It is an arithmetic number, because the mean of its divisors is an integer number (52057404).

Almost surely, 2^399106626 is an apocalyptic number.

399106626 is an abundant number, since it is smaller than the sum of its proper divisors (433811838).

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

399106626 is a wasteful number, since it uses less digits than its factorization.

399106626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892105.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 399106626 is about 19977.6531654747. The cubic root of 399106626 is about 736.2573545212.

The spelling of 399106626 in words is "three hundred ninety-nine million, one hundred six thousand, six hundred twenty-six".