396897280 has 176 divisors, whose sum is σ = 1052321760. Its totient is φ = 142737408.

The previous prime is 396897253. The next prime is 396897287. The reversal of 396897280 is 82798693.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (396897287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4459476 + ... + 4459564.

Almost surely, 2^396897280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 396897280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526160880).

396897280 is an abundant number, since it is smaller than the sum of its proper divisors (655424480).

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

396897280 is a wasteful number, since it uses less digits than its factorization.

396897280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 396897280 is about 19922.2809939023. The cubic root of 396897280 is about 734.8962662309.

The spelling of 396897280 in words is "three hundred ninety-six million, eight hundred ninety-seven thousand, two hundred eighty".