997471152 has 80 divisors (see below), whose sum is σ = 2891585760. Its totient is φ = 329184000.

The previous prime is 997471109. The next prime is 997471171. The reversal of 997471152 is 251174799.

It is a super-3 number, since 3×997471152³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 997471098 and 997471107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32202 + ... + 55062.

It is an arithmetic number, because the mean of its divisors is an integer number (36144822).

Almost surely, 2^997471152 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 997471152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1445792880).

997471152 is an abundant number, since it is smaller than the sum of its proper divisors (1894114608).

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

997471152 is a wasteful number, since it uses less digits than its factorization.

997471152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22979 (or 22967 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 997471152 is about 31582.7666932459. The cubic root of 997471152 is about 999.1563391031.

The spelling of 997471152 in words is "nine hundred ninety-seven million, four hundred seventy-one thousand, one hundred fifty-two".