397745370 has 128 divisors (see below), whose sum is σ = 1165812480. Its totient is φ = 95696640.

The previous prime is 397745323. The next prime is 397745377. The reversal of 397745370 is 73547793.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (397745377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 465864 + ... + 466716.

It is an arithmetic number, because the mean of its divisors is an integer number (9107910).

Almost surely, 2^397745370 is an apocalyptic number.

397745370 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 397745370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (582906240).

397745370 is an abundant number, since it is smaller than the sum of its proper divisors (768067110).

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

397745370 is a wasteful number, since it uses less digits than its factorization.

397745370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 555660, while the sum is 45.

The square root of 397745370 is about 19943.5545979146. The cubic root of 397745370 is about 735.4193358899.

The spelling of 397745370 in words is "three hundred ninety-seven million, seven hundred forty-five thousand, three hundred seventy".