997895808 has 512 divisors, whose sum is σ = 3838464000. Its totient is φ = 247836672.

The previous prime is 997895783. The next prime is 997895831. The reversal of 997895808 is 808598799.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5975341 + ... + 5975507.

It is an arithmetic number, because the mean of its divisors is an integer number (7497000).

Almost surely, 2^997895808 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 997895808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1919232000).

997895808 is an abundant number, since it is smaller than the sum of its proper divisors (2840568192).

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

997895808 is a wasteful number, since it uses less digits than its factorization.

997895808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 63.

The square root of 997895808 is about 31589.4888847541. The cubic root of 997895808 is about 999.2981101325.

The spelling of 997895808 in words is "nine hundred ninety-seven million, eight hundred ninety-five thousand, eight hundred eight".