997796070 has 160 divisors (see below), whose sum is σ = 2810142720. Its totient is φ = 253730880.

The previous prime is 997796053. The next prime is 997796089. The reversal of 997796070 is 70697799.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 997795998 and 997796016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1983439 + ... + 1983941.

It is an arithmetic number, because the mean of its divisors is an integer number (17563392).

Almost surely, 2^997796070 is an apocalyptic number.

997796070 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 997796070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1405071360).

997796070 is an abundant number, since it is smaller than the sum of its proper divisors (1812346650).

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

997796070 is a wasteful number, since it uses less digits than its factorization.

997796070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 1500282, while the sum is 54.

The square root of 997796070 is about 31587.9101872853. The cubic root of 997796070 is about 999.2648163041.

The spelling of 997796070 in words is "nine hundred ninety-seven million, seven hundred ninety-six thousand, seventy".