99976420 has 24 divisors (see below), whose sum is σ = 212829624. Its totient is φ = 39442176.

The previous prime is 99976403. The next prime is 99976421. The reversal of 99976420 is 2467999.

It can be written as a sum of positive squares in 4 ways, for example, as 19838116 + 80138304 = 4454^2 + 8952^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99976421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32779 + ... + 35698.

It is an arithmetic number, because the mean of its divisors is an integer number (8867901).

Almost surely, 2^99976420 is an apocalyptic number.

It is an amenable number.

99976420 is an abundant number, since it is smaller than the sum of its proper divisors (112853204).

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

99976420 is a wasteful number, since it uses less digits than its factorization.

99976420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68559 (or 68557 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 99976420 is about 9998.8209304898. The cubic root of 99976420 is about 464.1223976051.

The spelling of 99976420 in words is "ninety-nine million, nine hundred seventy-six thousand, four hundred twenty".