997782468 has 48 divisors (see below), whose sum is σ = 2413152000. Its totient is φ = 320497408.

The previous prime is 997782463. The next prime is 997782491. The reversal of 997782468 is 864287799.

It is not an unprimeable number, because it can be changed into a prime (997782463) 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, 195493 + ... + 200531.

It is an arithmetic number, because the mean of its divisors is an integer number (50274000).

Almost surely, 2^997782468 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 997782468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1206576000).

997782468 is an abundant number, since it is smaller than the sum of its proper divisors (1415369532).

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

997782468 is a wasteful number, since it uses less digits than its factorization.

997782468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5644 (or 5642 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 60.

The square root of 997782468 is about 31587.6948826596. The cubic root of 997782468 is about 999.2602756094.

The spelling of 997782468 in words is "nine hundred ninety-seven million, seven hundred eighty-two thousand, four hundred sixty-eight".