399742848 has 96 divisors (see below), whose sum is σ = 1154733840. Its totient is φ = 132734976.

The previous prime is 399742841. The next prime is 399742859. The reversal of 399742848 is 848247993.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×399742848² = 319588689054302208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 399742794 and 399742803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399742841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 406165 + ... + 407147.

Almost surely, 2^399742848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399742848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (577366920).

399742848 is an abundant number, since it is smaller than the sum of its proper divisors (754990992).

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

399742848 is a wasteful number, since it uses less digits than its factorization.

399742848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356 (or 1341 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 399742848 is about 19993.5701664310. The cubic root of 399742848 is about 736.6483732026.

The spelling of 399742848 in words is "three hundred ninety-nine million, seven hundred forty-two thousand, eight hundred forty-eight".