399534876 has 96 divisors (see below), whose sum is σ = 1119928320. Its totient is φ = 122447808.

The previous prime is 399534871. The next prime is 399534899. The reversal of 399534876 is 678435993.

399534876 is a `hidden beast` number, since 39 + 9 + 534 + 8 + 76 = 666.

It is a super-3 number, since 3×399534876³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399534871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 537361 + ... + 538103.

It is an arithmetic number, because the mean of its divisors is an integer number (11665920).

Almost surely, 2^399534876 is an apocalyptic number.

399534876 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399534876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (559964160).

399534876 is an abundant number, since it is smaller than the sum of its proper divisors (720393444).

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

399534876 is a wasteful number, since it uses less digits than its factorization.

399534876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1144 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 399534876 is about 19988.3685177155. The cubic root of 399534876 is about 736.5206003836.

The spelling of 399534876 in words is "three hundred ninety-nine million, five hundred thirty-four thousand, eight hundred seventy-six".