15480989 has 4 divisors (see below), whose sum is σ = 15841056. Its totient is φ = 15120924.

The previous prime is 15480979. The next prime is 15481009. The reversal of 15480989 is 98908451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15480989 - 2¹² = 15476893 is a prime.

It is a super-2 number, since 2×15480989² = 479322040836242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15480979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179969 + ... + 180054.

It is an arithmetic number, because the mean of its divisors is an integer number (3960264).

Almost surely, 2^15480989 is an apocalyptic number.

It is an amenable number.

15480989 is a deficient number, since it is larger than the sum of its proper divisors (360067).

15480989 is an equidigital number, since it uses as much as digits as its factorization.

15480989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360066.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 15480989 is about 3934.5887968122. The cubic root of 15480989 is about 249.2295695198.

The spelling of 15480989 in words is "fifteen million, four hundred eighty thousand, nine hundred eighty-nine".