997859544 has 32 divisors (see below), whose sum is σ = 2721435840. Its totient is φ = 302381600.

The previous prime is 997859543. The next prime is 997859563. The reversal of 997859544 is 445958799.

997859544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997859543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1889622 + ... + 1890149.

It is an arithmetic number, because the mean of its divisors is an integer number (85044870).

Almost surely, 2^997859544 is an apocalyptic number.

It is an amenable number.

997859544 is an abundant number, since it is smaller than the sum of its proper divisors (1723576296).

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

997859544 is a wasteful number, since it uses less digits than its factorization.

997859544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779791 (or 3779787 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 60.

The square root of 997859544 is about 31588.9148911450. The cubic root of 997859544 is about 999.2860049991.

The spelling of 997859544 in words is "nine hundred ninety-seven million, eight hundred fifty-nine thousand, five hundred forty-four".