99478020 has 48 divisors (see below), whose sum is σ = 279074880. Its totient is φ = 26476416.

The previous prime is 99478009. The next prime is 99478021. The reversal of 99478020 is 2087499.

It is a self number, because there is not a number n which added to its sum of digits gives 99478020.

It is not an unprimeable number, because it can be changed into a prime (99478021) 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, 37911 + ... + 40449.

It is an arithmetic number, because the mean of its divisors is an integer number (5814060).

Almost surely, 2^99478020 is an apocalyptic number.

It is an amenable number.

99478020 is an abundant number, since it is smaller than the sum of its proper divisors (179596860).

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

99478020 is a wasteful number, since it uses less digits than its factorization.

99478020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204 (or 3202 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 99478020 is about 9973.8668529312. The cubic root of 99478020 is about 463.3498685793.

The spelling of 99478020 in words is "ninety-nine million, four hundred seventy-eight thousand, twenty".