99228147890 has 16 divisors (see below), whose sum is σ = 180617529240. Its totient is φ = 39245289600.

The previous prime is 99228147871. The next prime is 99228147899. The reversal of 99228147890 is 9874182299.

It can be written as a sum of positive squares in 4 ways, for example, as 28960211329 + 70267936561 = 170177^2 + 265081^2 .

It is a super-2 number, since 2×99228147890² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99228147899) 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, 55745261 + ... + 55747040.

Almost surely, 2^99228147890 is an apocalyptic number.

99228147890 is a deficient number, since it is larger than the sum of its proper divisors (81389381350).

99228147890 is a wasteful number, since it uses less digits than its factorization.

99228147890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111492397.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The spelling of 99228147890 in words is "ninety-nine billion, two hundred twenty-eight million, one hundred forty-seven thousand, eight hundred ninety".