15978485 has 8 divisors (see below), whose sum is σ = 19792896. Its totient is φ = 12370320.

The previous prime is 15978481. The next prime is 15978497. The reversal of 15978485 is 58487951.

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

It is not a de Polignac number, because 15978485 - 2² = 15978481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15978481) 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, 51389 + ... + 51698.

It is an arithmetic number, because the mean of its divisors is an integer number (2474112).

Almost surely, 2^15978485 is an apocalyptic number.

It is an amenable number.

15978485 is a deficient number, since it is larger than the sum of its proper divisors (3814411).

15978485 is a wasteful number, since it uses less digits than its factorization.

15978485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103123.

The product of its digits is 403200, while the sum is 47.

The square root of 15978485 is about 3997.3097202994. The cubic root of 15978485 is about 251.8712126427.

The spelling of 15978485 in words is "fifteen million, nine hundred seventy-eight thousand, four hundred eighty-five".