399409102 has 16 divisors (see below), whose sum is σ = 615988800. Its totient is φ = 194136928.

The previous prime is 399409091. The next prime is 399409121. The reversal of 399409102 is 201904993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253 + ... + 28264.

It is an arithmetic number, because the mean of its divisors is an integer number (38499300).

Almost surely, 2^399409102 is an apocalyptic number.

399409102 is a deficient number, since it is larger than the sum of its proper divisors (216579698).

399409102 is a wasteful number, since it uses less digits than its factorization.

399409102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28715.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 399409102 is about 19985.2220903346. Note that the first 3 decimals coincide. The cubic root of 399409102 is about 736.4433064519.

The spelling of 399409102 in words is "three hundred ninety-nine million, four hundred nine thousand, one hundred two".