99155438 has 16 divisors (see below), whose sum is σ = 155484576. Its totient is φ = 47335200.

The previous prime is 99155431. The next prime is 99155443. The reversal of 99155438 is 83455199.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99155431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28388 + ... + 31688.

It is an arithmetic number, because the mean of its divisors is an integer number (9717786).

Almost surely, 2^99155438 is an apocalyptic number.

99155438 is a deficient number, since it is larger than the sum of its proper divisors (56329138).

99155438 is a wasteful number, since it uses less digits than its factorization.

99155438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979.

The product of its digits is 194400, while the sum is 44.

The square root of 99155438 is about 9957.6823608709. The cubic root of 99155438 is about 462.8484841809.

The spelling of 99155438 in words is "ninety-nine million, one hundred fifty-five thousand, four hundred thirty-eight".