15450989 has 8 divisors (see below), whose sum is σ = 15996672. Its totient is φ = 14908320.

The previous prime is 15450983. The next prime is 15450991. The reversal of 15450989 is 98905451.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 15450989 - 2²⁰ = 14402413 is a prime.

It is a super-2 number, since 2×15450989² = 477466122156242, 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 (15450983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15737 + ... + 16689.

It is an arithmetic number, because the mean of its divisors is an integer number (1999584).

Almost surely, 2^15450989 is an apocalyptic number.

It is an amenable number.

15450989 is a deficient number, since it is larger than the sum of its proper divisors (545683).

15450989 is an equidigital number, since it uses as much as digits as its factorization.

15450989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 15450989 is about 3930.7746055962. The cubic root of 15450989 is about 249.0684746867.

The spelling of 15450989 in words is "fifteen million, four hundred fifty thousand, nine hundred eighty-nine".