18401480 has 32 divisors (see below), whose sum is σ = 43840440. Its totient is φ = 6927360.

The previous prime is 18401479. The next prime is 18401501. The reversal of 18401480 is 8410481.

It can be written as a sum of positive squares in 4 ways, for example, as 13675204 + 4726276 = 3698^2 + 2174^2 .

It is a super-2 number, since 2×18401480² = 677228932380800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12851 + ... + 14210.

Almost surely, 2^18401480 is an apocalyptic number.

18401480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18401480 is an abundant number, since it is smaller than the sum of its proper divisors (25438960).

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

18401480 is a wasteful number, since it uses less digits than its factorization.

18401480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27089 (or 27085 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 18401480 is about 4289.6946278261. The cubic root of 18401480 is about 264.0083024631.

Subtracting from 18401480 its reverse (8410481), we obtain a palindrome (9990999).

It can be divided in two parts, 18401 and 480, that added together give a palindrome (18881).

The spelling of 18401480 in words is "eighteen million, four hundred one thousand, four hundred eighty".