997003044 has 18 divisors (see below), whose sum is σ = 2520202230. Its totient is φ = 332334336.

The previous prime is 997003043. The next prime is 997003099. The reversal of 997003044 is 440300799.

It can be written as a sum of positive squares in only one way, i.e., 536385600 + 460617444 = 23160^2 + 21462^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 27694529 = 997003044 / (9 + 9 + 7 + 0 + 0 + 3 + 0 + 4 + 4).

It is not an unprimeable number, because it can be changed into a prime (997003043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13847229 + ... + 13847300.

It is an arithmetic number, because the mean of its divisors is an integer number (140011235).

Almost surely, 2^997003044 is an apocalyptic number.

It is an amenable number.

997003044 is an abundant number, since it is smaller than the sum of its proper divisors (1523199186).

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

997003044 is a wasteful number, since it uses less digits than its factorization.

997003044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27694539 (or 27694534 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 997003044 is about 31575.3550098807. The cubic root of 997003044 is about 999.0000150300. Note that the first 4 decimals are identical.

The spelling of 997003044 in words is "nine hundred ninety-seven million, three thousand, forty-four".