397794240 has 280 divisors, whose sum is σ = 1438351200. Its totient is φ = 104343552.

The previous prime is 397794233. The next prime is 397794251. The reversal of 397794240 is 42497793.

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

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 2669686 + ... + 2669834.

Almost surely, 2^397794240 is an apocalyptic number.

397794240 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 397794240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719175600).

397794240 is an abundant number, since it is smaller than the sum of its proper divisors (1040556960).

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

397794240 is a wasteful number, since it uses less digits than its factorization.

397794240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 397794240 is about 19944.7797681499. The cubic root of 397794240 is about 735.4494543809.

The spelling of 397794240 in words is "three hundred ninety-seven million, seven hundred ninety-four thousand, two hundred forty".