997194144 has 96 divisors (see below), whose sum is σ = 2664204480. Its totient is φ = 326541312.

The previous prime is 997194131. The next prime is 997194167. The reversal of 997194144 is 441491799.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 997194093 and 997194102.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1610667 + ... + 1611285.

It is an arithmetic number, because the mean of its divisors is an integer number (27752130).

Almost surely, 2^997194144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997194144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332102240).

997194144 is an abundant number, since it is smaller than the sum of its proper divisors (1667010336).

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

997194144 is a wasteful number, since it uses less digits than its factorization.

997194144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 894 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 997194144 is about 31578.3809591309. The cubic root of 997194144 is about 999.0638385419.

The spelling of 997194144 in words is "nine hundred ninety-seven million, one hundred ninety-four thousand, one hundred forty-four".