397964250 has 96 divisors (see below), whose sum is σ = 1089571392. Its totient is φ = 104796000.

The previous prime is 397964221. The next prime is 397964251. The reversal of 397964250 is 52469793.

It is a happy number.

397964250 is a `hidden beast` number, since 397 + 9 + 6 + 4 + 250 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 397964196 and 397964205.

It is not an unprimeable number, because it can be changed into a prime (397964251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 185685 + ... + 187815.

It is an arithmetic number, because the mean of its divisors is an integer number (11349702).

Almost surely, 2^397964250 is an apocalyptic number.

397964250 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 397964250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (544785696).

397964250 is an abundant number, since it is smaller than the sum of its proper divisors (691607142).

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

397964250 is a wasteful number, since it uses less digits than its factorization.

397964250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 2224 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 397964250 is about 19949.0413303497. The cubic root of 397964250 is about 735.5542120178.

The spelling of 397964250 in words is "three hundred ninety-seven million, nine hundred sixty-four thousand, two hundred fifty".