997477536 has 144 divisors (see below), whose sum is σ = 2946458592. Its totient is φ = 295088640.

The previous prime is 997477531. The next prime is 997477553. The reversal of 997477536 is 635774799.

It is a super-2 number, since 2×997477536² = 1989922869649262592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (997477531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 498490 + ... + 500486.

It is an arithmetic number, because the mean of its divisors is an integer number (20461518).

Almost surely, 2^997477536 is an apocalyptic number.

997477536 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997477536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473229296).

997477536 is an abundant number, since it is smaller than the sum of its proper divisors (1948981056).

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

997477536 is a wasteful number, since it uses less digits than its factorization.

997477536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2075 (or 2056 counting only the distinct ones).

The product of its digits is 10001880, while the sum is 57.

The square root of 997477536 is about 31582.8677608605. The cubic root of 997477536 is about 999.1584706937.

It can be divided in two parts, 9974775 and 36, that added together give a triangular number (9974811 = T₄₄₆₆).

The spelling of 997477536 in words is "nine hundred ninety-seven million, four hundred seventy-seven thousand, five hundred thirty-six".