99628438 has 64 divisors (see below), whose sum is σ = 198051840. Its totient is φ = 36484992.

The previous prime is 99628421. The next prime is 99628439. The reversal of 99628438 is 83482699.

It is a junction number, because it is equal to n+sod(n) for n = 99628391 and 99628400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99628439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162220 + ... + 162832.

It is an arithmetic number, because the mean of its divisors is an integer number (3094560).

Almost surely, 2^99628438 is an apocalyptic number.

99628438 is a deficient number, since it is larger than the sum of its proper divisors (98423402).

99628438 is a wasteful number, since it uses less digits than its factorization.

99628438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701.

The product of its digits is 746496, while the sum is 49.

The square root of 99628438 is about 9981.4046105746. The cubic root of 99628438 is about 463.5832905334.

The spelling of 99628438 in words is "ninety-nine million, six hundred twenty-eight thousand, four hundred thirty-eight".