397417440 has 288 divisors, whose sum is σ = 1485467424. Its totient is φ = 89026560.

The previous prime is 397417369. The next prime is 397417453. The reversal of 397417440 is 44714793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1434582 + ... + 1434858.

It is an arithmetic number, because the mean of its divisors is an integer number (5157873).

Almost surely, 2^397417440 is an apocalyptic number.

397417440 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 397417440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742733712).

397417440 is an abundant number, since it is smaller than the sum of its proper divisors (1088049984).

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

397417440 is a wasteful number, since it uses less digits than its factorization.

397417440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 397417440 is about 19935.3314494643. The cubic root of 397417440 is about 735.2171693870.

The spelling of 397417440 in words is "three hundred ninety-seven million, four hundred seventeen thousand, four hundred forty".