399876249806 has 32 divisors (see below), whose sum is σ = 669045391488. Its totient is φ = 177702164640.

The previous prime is 399876249803. The next prime is 399876249827. The reversal of 399876249806 is 608942678993.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 399876249806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399876249803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275936 + ... + 935891.

It is an arithmetic number, because the mean of its divisors is an integer number (20907668484).

Almost surely, 2^399876249806 is an apocalyptic number.

399876249806 is a deficient number, since it is larger than the sum of its proper divisors (269169141682).

399876249806 is a wasteful number, since it uses less digits than its factorization.

399876249806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212176.

The product of its (nonzero) digits is 282175488, while the sum is 71.

The spelling of 399876249806 in words is "three hundred ninety-nine billion, eight hundred seventy-six million, two hundred forty-nine thousand, eight hundred six".