98837640 has 144 divisors (see below), whose sum is σ = 353234700. Its totient is φ = 23950080.

The previous prime is 98837617. The next prime is 98837671. The reversal of 98837640 is 4673889.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 86601636 + 12236004 = 9306^2 + 3498^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42426 + ... + 44694.

Almost surely, 2^98837640 is an apocalyptic number.

98837640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 98837640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176617350).

98837640 is an abundant number, since it is smaller than the sum of its proper divisors (254397060).

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

98837640 is a wasteful number, since it uses less digits than its factorization.

98837640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308 (or 2290 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 98837640 is about 9941.7121261883. The cubic root of 98837640 is about 462.3534709910.

It can be divided in two parts, 98 and 837640, that added together give a palindrome (837738).

The spelling of 98837640 in words is "ninety-eight million, eight hundred thirty-seven thousand, six hundred forty".