399866548 has 24 divisors (see below), whose sum is σ = 721294112. Its totient is φ = 193821984.

The previous prime is 399866513. The next prime is 399866549. The reversal of 399866548 is 845668993.

It is a junction number, because it is equal to n+sod(n) for n = 399866492 and 399866501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399866549) 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, 37111 + ... + 46657.

Almost surely, 2^399866548 is an apocalyptic number.

It is an amenable number.

399866548 is a deficient number, since it is larger than the sum of its proper divisors (321427564).

399866548 is a wasteful number, since it uses less digits than its factorization.

399866548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9871 (or 9869 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 58.

The square root of 399866548 is about 19996.6634216811. The cubic root of 399866548 is about 736.7243503852.

The spelling of 399866548 in words is "three hundred ninety-nine million, eight hundred sixty-six thousand, five hundred forty-eight".