9959580 has 36 divisors (see below), whose sum is σ = 30211272. Its totient is φ = 2655840.

The previous prime is 9959563. The next prime is 9959581. The reversal of 9959580 is 859599.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9959581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27486 + ... + 27845.

It is an arithmetic number, because the mean of its divisors is an integer number (839202).

Almost surely, 2^9959580 is an apocalyptic number.

9959580 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9959580 is an abundant number, since it is smaller than the sum of its proper divisors (20251692).

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

9959580 is a wasteful number, since it uses less digits than its factorization.

9959580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55346 (or 55341 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The square root of 9959580 is about 3155.8802258641. The cubic root of 9959580 is about 215.1528028593.

The spelling of 9959580 in words is "nine million, nine hundred fifty-nine thousand, five hundred eighty".