99238466278 has 24 divisors (see below), whose sum is σ = 173237567832. Its totient is φ = 42511964544.

The previous prime is 99238466273. The next prime is 99238466303. The reversal of 99238466278 is 87266483299.

99238466278 is a nontrivial binomial coefficient, being equal to C(445508, 2).

It is a super-4 number, since 4×99238466278⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99238466273) 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 11 ways as a sum of consecutive naturals, for example, 1 + ... + 445507.

It is an arithmetic number, because the mean of its divisors is an integer number (7218231993).

Almost surely, 2^99238466278 is an apocalyptic number.

99238466278 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

99238466278 is the 445507-th triangular number and also the 222754-th hexagonal number.

99238466278 is the 148503-rd centered nonagonal number.

99238466278 is a deficient number, since it is larger than the sum of its proper divisors (73999101554).

99238466278 is a wasteful number, since it uses less digits than its factorization.

99238466278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447796 (or 447789 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 64.

It can be divided in two parts, 99238 and 466278, that added together give a triangular number (565516 = T₁₀₆₃).

The spelling of 99238466278 in words is "ninety-nine billion, two hundred thirty-eight million, four hundred sixty-six thousand, two hundred seventy-eight".