18461490 has 64 divisors (see below), whose sum is σ = 47869056. Its totient is φ = 4539392.

The previous prime is 18461489. The next prime is 18461519. The reversal of 18461490 is 9416481.

It is a super-3 number, since 3×18461490³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26689 + ... + 27371.

It is an arithmetic number, because the mean of its divisors is an integer number (747954).

Almost surely, 2^18461490 is an apocalyptic number.

18461490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18461490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23934528).

18461490 is an abundant number, since it is smaller than the sum of its proper divisors (29407566).

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

18461490 is a wasteful number, since it uses less digits than its factorization.

18461490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18461490 is about 4296.6836048283. The cubic root of 18461490 is about 264.2949813440.

The spelling of 18461490 in words is "eighteen million, four hundred sixty-one thousand, four hundred ninety".