397605100 has 36 divisors (see below), whose sum is σ = 867225744. Its totient is φ = 158226880.

The previous prime is 397605079. The next prime is 397605107. The reversal of 397605100 is 1506793.

It is not an unprimeable number, because it can be changed into a prime (397605107) 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, 9609 + ... + 29791.

It is an arithmetic number, because the mean of its divisors is an integer number (24089604).

Almost surely, 2^397605100 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 397605100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433612872).

397605100 is an abundant number, since it is smaller than the sum of its proper divisors (469620644).

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

397605100 is a wasteful number, since it uses less digits than its factorization.

397605100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20394 (or 20387 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 397605100 is about 19940.0376128030. The cubic root of 397605100 is about 735.3328740419.

The spelling of 397605100 in words is "three hundred ninety-seven million, six hundred five thousand, one hundred".