17997480 has 48 divisors (see below), whose sum is σ = 58492980. Its totient is φ = 4799232.

The previous prime is 17997461. The next prime is 17997481. The reversal of 17997480 is 8479971.

It can be written as a sum of positive squares in 2 ways, for example, as 17994564 + 2916 = 4242^2 + 54^2 .

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

It is not an unprimeable number, because it can be changed into a prime (17997481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24637 + ... + 25356.

Almost surely, 2^17997480 is an apocalyptic number.

17997480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17997480 is an abundant number, since it is smaller than the sum of its proper divisors (40495500).

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

17997480 is a wasteful number, since it uses less digits than its factorization.

17997480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50010 (or 50003 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 17997480 is about 4242.3436918760. The cubic root of 17997480 is about 262.0619087236.

The spelling of 17997480 in words is "seventeen million, nine hundred ninety-seven thousand, four hundred eighty".