99863444 has 24 divisors (see below), whose sum is σ = 181254528. Its totient is φ = 48103200.

The previous prime is 99863441. The next prime is 99863471. The reversal of 99863444 is 44436899.

It is a happy number.

It is a super-2 number, since 2×99863444² = 19945414895082272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99863441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11969 + ... + 18519.

It is an arithmetic number, because the mean of its divisors is an integer number (7552272).

Almost surely, 2^99863444 is an apocalyptic number.

It is an amenable number.

99863444 is a deficient number, since it is larger than the sum of its proper divisors (81391084).

99863444 is a wasteful number, since it uses less digits than its factorization.

99863444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6695 (or 6693 counting only the distinct ones).

The product of its digits is 746496, while the sum is 47.

The square root of 99863444 is about 9993.1698674645. The cubic root of 99863444 is about 463.9475081820.

The spelling of 99863444 in words is "ninety-nine million, eight hundred sixty-three thousand, four hundred forty-four".