997350140 has 24 divisors (see below), whose sum is σ = 2095223760. Its totient is φ = 398789888.

The previous prime is 997350139. The next prime is 997350143. The reversal of 997350140 is 41053799.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 997350094 and 997350103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997350143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56276 + ... + 71844.

It is an arithmetic number, because the mean of its divisors is an integer number (87300990).

Almost surely, 2^997350140 is an apocalyptic number.

It is an amenable number.

997350140 is an abundant number, since it is smaller than the sum of its proper divisors (1097873620).

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

997350140 is a wasteful number, since it uses less digits than its factorization.

997350140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18781 (or 18779 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 997350140 is about 31580.8508435096. The cubic root of 997350140 is about 999.1159319874.

The spelling of 997350140 in words is "nine hundred ninety-seven million, three hundred fifty thousand, one hundred forty".