15480820 has 24 divisors (see below), whose sum is σ = 34221600. Its totient is φ = 5866272.

The previous prime is 15480779. The next prime is 15480853. The reversal of 15480820 is 2808451.

It is a congruent number.

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, 19990 + ... + 20749.

It is an arithmetic number, because the mean of its divisors is an integer number (1425900).

Almost surely, 2^15480820 is an apocalyptic number.

15480820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15480820 is an abundant number, since it is smaller than the sum of its proper divisors (18740780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15480820 is a wasteful number, since it uses less digits than its factorization.

15480820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40767 (or 40765 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 15480820 is about 3934.5673205576. The cubic root of 15480820 is about 249.2286626020.

The spelling of 15480820 in words is "fifteen million, four hundred eighty thousand, eight hundred twenty".