9997380 has 36 divisors (see below), whose sum is σ = 30325932. Its totient is φ = 2665920.

The previous prime is 9997367. The next prime is 9997381. The reversal of 9997380 is 837999.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1806336 + 8191044 = 1344^2 + 2862^2 .

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 not an unprimeable number, because it can be changed into a prime (9997381) 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, 27591 + ... + 27950.

It is an arithmetic number, because the mean of its divisors is an integer number (842387).

Almost surely, 2^9997380 is an apocalyptic number.

9997380 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9997380 is an abundant number, since it is smaller than the sum of its proper divisors (20328552).

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

9997380 is a wasteful number, since it uses less digits than its factorization.

9997380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55556 (or 55551 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 9997380 is about 3161.8633746574. The cubic root of 9997380 is about 215.4246519634.

It can be divided in two parts, 99 and 97380, that added together give a palindrome (97479).

The spelling of 9997380 in words is "nine million, nine hundred ninety-seven thousand, three hundred eighty".