15990465 has 8 divisors (see below), whose sum is σ = 25584768. Its totient is φ = 8528240.

The previous prime is 15990437. The next prime is 15990473. The reversal of 15990465 is 56409951.

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

It is not a de Polignac number, because 15990465 - 2⁵ = 15990433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533001 + ... + 533030.

It is an arithmetic number, because the mean of its divisors is an integer number (3198096).

Almost surely, 2^15990465 is an apocalyptic number.

15990465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15990465 is a deficient number, since it is larger than the sum of its proper divisors (9594303).

15990465 is a wasteful number, since it uses less digits than its factorization.

15990465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066039.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 15990465 is about 3998.8079473763. The cubic root of 15990465 is about 251.9341444190.

The spelling of 15990465 in words is "fifteen million, nine hundred ninety thousand, four hundred sixty-five".