15980890 has 8 divisors (see below), whose sum is σ = 28765620. Its totient is φ = 6392352.

The previous prime is 15980879. The next prime is 15980891. The reversal of 15980890 is 9808951.

It can be written as a sum of positive squares in 2 ways, for example, as 13155129 + 2825761 = 3627^2 + 1681^2 .

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

It is not an unprimeable number, because it can be changed into a prime (15980891) 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, 799035 + ... + 799054.

Almost surely, 2^15980890 is an apocalyptic number.

15980890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15980890 is a deficient number, since it is larger than the sum of its proper divisors (12784730).

15980890 is a wasteful number, since it uses less digits than its factorization.

15980890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598096.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 15980890 is about 3997.6105363079. The cubic root of 15980890 is about 251.8838487985.

The spelling of 15980890 in words is "fifteen million, nine hundred eighty thousand, eight hundred ninety".