397737984 has 204 divisors, whose sum is σ = 1287641504. Its totient is φ = 106954752.

The previous prime is 397737979. The next prime is 397737997. The reversal of 397737984 is 489737793.

It is a tau number, because it is divible by the number of its divisors (204).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23396344 + ... + 23396360.

Almost surely, 2^397737984 is an apocalyptic number.

397737984 is a gapful number since it is divisible by the number (34) 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 397737984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (643820752).

397737984 is an abundant number, since it is smaller than the sum of its proper divisors (889903520).

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

397737984 is an frugal number, since it uses more digits than its factorization.

397737984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 29 counting only the distinct ones).

The product of its digits is 8001504, while the sum is 57.

The square root of 397737984 is about 19943.3694244478. The cubic root of 397737984 is about 735.4147836971.

The spelling of 397737984 in words is "three hundred ninety-seven million, seven hundred thirty-seven thousand, nine hundred eighty-four".