99420804 has 72 divisors (see below), whose sum is σ = 299856480. Its totient is φ = 28404432.

The previous prime is 99420799. The next prime is 99420809. The reversal of 99420804 is 40802499.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (99420799) and next prime (99420809).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (99420809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4102 + ... + 14685.

Almost surely, 2^99420804 is an apocalyptic number.

It is an amenable number.

99420804 is an abundant number, since it is smaller than the sum of its proper divisors (200435676).

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

99420804 is a wasteful number, since it uses less digits than its factorization.

99420804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18814 (or 18799 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 99420804 is about 9970.9981446192. The cubic root of 99420804 is about 463.2610177611.

It can be divided in two parts, 99 and 420804, that added together give a triangular number (420903 = T₉₁₇).

The spelling of 99420804 in words is "ninety-nine million, four hundred twenty thousand, eight hundred four".