99491420 has 48 divisors (see below), whose sum is σ = 244617408. Its totient is φ = 33277440.

The previous prime is 99491411. The next prime is 99491423. The reversal of 99491420 is 2419499.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99491423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2927 + ... + 14406.

It is an arithmetic number, because the mean of its divisors is an integer number (5096196).

Almost surely, 2^99491420 is an apocalyptic number.

It is an amenable number.

99491420 is an abundant number, since it is smaller than the sum of its proper divisors (145125988).

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

99491420 is a wasteful number, since it uses less digits than its factorization.

99491420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17390 (or 17388 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 99491420 is about 9974.5385858194. The cubic root of 99491420 is about 463.3706725367.

The spelling of 99491420 in words is "ninety-nine million, four hundred ninety-one thousand, four hundred twenty".