399245971224 has 128 divisors (see below), whose sum is σ = 1077857280000. Its totient is φ = 122857050624.

The previous prime is 399245971219. The next prime is 399245971249. The reversal of 399245971224 is 422179542993.

It is a super-3 number, since 3×399245971224³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76819794 + ... + 76824990.

It is an arithmetic number, because the mean of its divisors is an integer number (8420760000).

Almost surely, 2^399245971224 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 399245971224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538928640000).

399245971224 is an abundant number, since it is smaller than the sum of its proper divisors (678611308776).

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

399245971224 is a wasteful number, since it uses less digits than its factorization.

399245971224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10057 (or 10053 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 57.

The spelling of 399245971224 in words is "three hundred ninety-nine billion, two hundred forty-five million, nine hundred seventy-one thousand, two hundred twenty-four".