99259578 has 48 divisors (see below), whose sum is σ = 235321632. Its totient is φ = 29988000.

The previous prime is 99259577. The next prime is 99259607. The reversal of 99259578 is 87595299.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99259571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96708 + ... + 97728.

It is an arithmetic number, because the mean of its divisors is an integer number (4902534).

Almost surely, 2^99259578 is an apocalyptic number.

99259578 is an abundant number, since it is smaller than the sum of its proper divisors (136062054).

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

99259578 is a wasteful number, since it uses less digits than its factorization.

99259578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531 (or 1528 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The square root of 99259578 is about 9962.9101170291. The cubic root of 99259578 is about 463.0104661399.

It can be divided in two parts, 9925 and 9578, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 99259578 in words is "ninety-nine million, two hundred fifty-nine thousand, five hundred seventy-eight".