397910016 has 224 divisors, whose sum is σ = 1352580480. Its totient is φ = 113246208.

The previous prime is 397909997. The next prime is 397910021. The reversal of 397910016 is 610019793.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1548160 + ... + 1548416.

Almost surely, 2^397910016 is an apocalyptic number.

397910016 is a gapful number since it is divisible by the number (36) 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 397910016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676290240).

397910016 is an abundant number, since it is smaller than the sum of its proper divisors (954670464).

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

397910016 is an equidigital number, since it uses as much as digits as its factorization.

397910016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 397910016 is about 19947.6819705950. The cubic root of 397910016 is about 735.5207970737.

The spelling of 397910016 in words is "three hundred ninety-seven million, nine hundred ten thousand, sixteen".