15490 has 8 divisors (see below), whose sum is σ = 27900. Its totient is φ = 6192.

The previous prime is 15473. The next prime is 15493. The reversal of 15490 is 9451.

15490 = T₈₆ + T₈₇ + ... + T₈₉.

It can be written as a sum of positive squares in 2 ways, for example, as 15129 + 361 = 123^2 + 19^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (15493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765 + ... + 784.

2¹⁵⁴⁹⁰ is an apocalyptic number.

15490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15490 is a deficient number, since it is larger than the sum of its proper divisors (12410).

15490 is a wasteful number, since it uses less digits than its factorization.

15490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 15490 is about 124.4588285338. The cubic root of 15490 is about 24.9277916389.

It can be divided in two parts, 15 and 490, that added together give a palindrome (505).

The spelling of 15490 in words is "fifteen thousand, four hundred ninety".