997769268 has 36 divisors (see below), whose sum is σ = 2654884960. Its totient is φ = 315084816.

The previous prime is 997769263. The next prime is 997769281. The reversal of 997769268 is 862967799.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997769263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 728680 + ... + 730047.

Almost surely, 2^997769268 is an apocalyptic number.

It is an amenable number.

997769268 is an abundant number, since it is smaller than the sum of its proper divisors (1657115692).

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

997769268 is a wasteful number, since it uses less digits than its factorization.

997769268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458756 (or 1458751 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The square root of 997769268 is about 31587.4859398465. The cubic root of 997769268 is about 999.2558690732.

The spelling of 997769268 in words is "nine hundred ninety-seven million, seven hundred sixty-nine thousand, two hundred sixty-eight".