99443640 has 32 divisors (see below), whose sum is σ = 298331280. Its totient is φ = 26518272.

The previous prime is 99443627. The next prime is 99443671. The reversal of 99443640 is 4634499.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414229 + ... + 414468.

Almost surely, 2^99443640 is an apocalyptic number.

It is an amenable number.

99443640 is an abundant number, since it is smaller than the sum of its proper divisors (198887640).

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

99443640 is a wasteful number, since it uses less digits than its factorization.

99443640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828711 (or 828707 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 99443640 is about 9972.1431999345. The cubic root of 99443640 is about 463.2964839087.

The spelling of 99443640 in words is "ninety-nine million, four hundred forty-three thousand, six hundred forty".