397770000 has 100 divisors (see below), whose sum is σ = 1284151440. Its totient is φ = 106064000.

The previous prime is 397769993. The next prime is 397770001. The reversal of 397770000 is 77793.

It is a tau number, because it is divible by the number of its divisors (100).

It is not an unprimeable number, because it can be changed into a prime (397770001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23371 + ... + 36629.

Almost surely, 2^397770000 is an apocalyptic number.

397770000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397770000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (642075720).

397770000 is an abundant number, since it is smaller than the sum of its proper divisors (886381440).

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

397770000 is a wasteful number, since it uses less digits than its factorization.

397770000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13290 (or 13269 counting only the distinct ones).

The product of its (nonzero) digits is 9261, while the sum is 33.

The square root of 397770000 is about 19944.1720810867. The cubic root of 397770000 is about 735.4345156219.

The spelling of 397770000 in words is "three hundred ninety-seven million, seven hundred seventy thousand".