99997380 has 144 divisors (see below), whose sum is σ = 364990080. Its totient is φ = 21648384.

The previous prime is 99997369. The next prime is 99997393. The reversal of 99997380 is 8379999.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21852 + ... + 26028.

Almost surely, 2^99997380 is an apocalyptic number.

99997380 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99997380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182495040).

99997380 is an abundant number, since it is smaller than the sum of its proper divisors (264992700).

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

99997380 is a wasteful number, since it uses less digits than its factorization.

99997380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218 (or 4213 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 99997380 is about 9999.8689991419. The cubic root of 99997380 is about 464.1548296716.

The spelling of 99997380 in words is "ninety-nine million, nine hundred ninety-seven thousand, three hundred eighty".