997536388 has 6 divisors (see below), whose sum is σ = 1745688686. Its totient is φ = 498768192.

The previous prime is 997536367. The next prime is 997536433. The reversal of 997536388 is 883635799.

997536388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 931958784 + 65577604 = 30528^2 + 8098^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124692045 + ... + 124692052.

Almost surely, 2^997536388 is an apocalyptic number.

It is an amenable number.

997536388 is a deficient number, since it is larger than the sum of its proper divisors (748152298).

997536388 is a wasteful number, since it uses less digits than its factorization.

997536388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249384101 (or 249384099 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 58.

The square root of 997536388 is about 31583.7994547838. The cubic root of 997536388 is about 999.1781206995.

The spelling of 997536388 in words is "nine hundred ninety-seven million, five hundred thirty-six thousand, three hundred eighty-eight".