397829808 has 120 divisors (see below), whose sum is σ = 1164354048. Its totient is φ = 126677376.

The previous prime is 397829791. The next prime is 397829821. The reversal of 397829808 is 808928793.

It is a super-2 number, since 2×397829808² = 316537112266633728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 290341 + ... + 291707.

Almost surely, 2^397829808 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 397829808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (582177024).

397829808 is an abundant number, since it is smaller than the sum of its proper divisors (766524240).

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

397829808 is a wasteful number, since it uses less digits than its factorization.

397829808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471 (or 1462 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 397829808 is about 19945.6714101080. The cubic root of 397829808 is about 735.4713733229.

The spelling of 397829808 in words is "three hundred ninety-seven million, eight hundred twenty-nine thousand, eight hundred eight".