98643690 has 64 divisors (see below), whose sum is σ = 278536320. Its totient is φ = 24756480.

The previous prime is 98643683. The next prime is 98643719. The reversal of 98643690 is 9634689.

It is a super-2 number, since 2×98643690² = 19461155153632200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6156 + ... + 15335.

It is an arithmetic number, because the mean of its divisors is an integer number (4352130).

Almost surely, 2^98643690 is an apocalyptic number.

98643690 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

98643690 is an abundant number, since it is smaller than the sum of its proper divisors (179892630).

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

98643690 is a wasteful number, since it uses less digits than its factorization.

98643690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21524 (or 21518 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 98643690 is about 9931.9529801545. The cubic root of 98643690 is about 462.0508461495.

The spelling of 98643690 in words is "ninety-eight million, six hundred forty-three thousand, six hundred ninety".