399356622 has 128 divisors (see below), whose sum is σ = 1111449600. Its totient is φ = 103638528.

The previous prime is 399356621. The next prime is 399356653. The reversal of 399356622 is 226653993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399356621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 185283 + ... + 187425.

It is an arithmetic number, because the mean of its divisors is an integer number (8683200).

Almost surely, 2^399356622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399356622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555724800).

399356622 is an abundant number, since it is smaller than the sum of its proper divisors (712092978).

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

399356622 is a wasteful number, since it uses less digits than its factorization.

399356622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207 (or 2201 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 399356622 is about 19983.9090770550. The cubic root of 399356622 is about 736.4110502703.

The spelling of 399356622 in words is "three hundred ninety-nine million, three hundred fifty-six thousand, six hundred twenty-two".