99810540 has 36 divisors (see below), whose sum is σ = 302759184. Its totient is φ = 26616096.

The previous prime is 99810517. The next prime is 99810541. The reversal of 99810540 is 4501899.

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 (36).

It is a junction number, because it is equal to n+sod(n) for n = 99810495 and 99810504.

It is not an unprimeable number, because it can be changed into a prime (99810541) 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, 277072 + ... + 277431.

Almost surely, 2^99810540 is an apocalyptic number.

99810540 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99810540 is an abundant number, since it is smaller than the sum of its proper divisors (202948644).

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

99810540 is a wasteful number, since it uses less digits than its factorization.

99810540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554518 (or 554513 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 99810540 is about 9990.5225088581. The cubic root of 99810540 is about 463.8655662369.

The spelling of 99810540 in words is "ninety-nine million, eight hundred ten thousand, five hundred forty".