997704450 has 54 divisors (see below), whose sum is σ = 2682300699. Its totient is φ = 265875840.

The previous prime is 997704397. The next prime is 997704473. The reversal of 997704450 is 54407799.

It can be written as a sum of positive squares in 5 ways, for example, as 110439081 + 887265369 = 10509^2 + 29787^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=22335.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 997704396 and 997704405.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 669306 + ... + 670794.

Almost surely, 2^997704450 is an apocalyptic number.

997704450 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

997704450 is an abundant number, since it is smaller than the sum of its proper divisors (1684596249).

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

997704450 is a wasteful number, since it uses less digits than its factorization.

997704450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996 (or 1499 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 997704450 is about 31586.4599156031. The cubic root of 997704450 is about 999.2342304133.

The spelling of 997704450 in words is "nine hundred ninety-seven million, seven hundred four thousand, four hundred fifty".