1997096556 has 192 divisors, whose sum is σ = 6116705280. Its totient is φ = 492134400.

The previous prime is 1997096531. The next prime is 1997096579. The reversal of 1997096556 is 6556907991.

It is a super-2 number, since 2×1997096556² = 7976789307974122272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1997096496 and 1997096505.

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, 3322656 + ... + 3323256.

It is an arithmetic number, because the mean of its divisors is an integer number (31857840).

Almost surely, 2^1997096556 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 1997096556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3058352640).

1997096556 is an abundant number, since it is smaller than the sum of its proper divisors (4119608724).

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

1997096556 is a wasteful number, since it uses less digits than its factorization.

1997096556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 4592700, while the sum is 57.

The square root of 1997096556 is about 44688.8862694071. The cubic root of 1997096556 is about 1259.3110695902.

The spelling of 1997096556 in words is "one billion, nine hundred ninety-seven million, ninety-six thousand, five hundred fifty-six".