9945380 has 12 divisors (see below), whose sum is σ = 20885340. Its totient is φ = 3978144.

The previous prime is 9945359. The next prime is 9945409. The reversal of 9945380 is 835499.

It can be written as a sum of positive squares in 2 ways, for example, as 1136356 + 8809024 = 1066^2 + 2968^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248615 + ... + 248654.

It is an arithmetic number, because the mean of its divisors is an integer number (1740445).

Almost surely, 2^9945380 is an apocalyptic number.

It is an amenable number.

9945380 is an abundant number, since it is smaller than the sum of its proper divisors (10939960).

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

9945380 is a wasteful number, since it uses less digits than its factorization.

9945380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497278 (or 497276 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 9945380 is about 3153.6296548580. The cubic root of 9945380 is about 215.0505019278.

The spelling of 9945380 in words is "nine million, nine hundred forty-five thousand, three hundred eighty".