98381790 has 80 divisors (see below), whose sum is σ = 284917248. Its totient is φ = 24214464.

The previous prime is 98381749. The next prime is 98381797. The reversal of 98381790 is 9718389.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98381797) 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 39 ways as a sum of consecutive naturals, for example, 5859 + ... + 15201.

Almost surely, 2^98381790 is an apocalyptic number.

98381790 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 98381790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142458624).

98381790 is an abundant number, since it is smaller than the sum of its proper divisors (186535458).

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

98381790 is a wasteful number, since it uses less digits than its factorization.

98381790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9375 (or 9366 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 98381790 is about 9918.7594990503. The cubic root of 98381790 is about 461.6415671573.

It can be divided in two parts, 9838 and 1790, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 98381790 in words is "ninety-eight million, three hundred eighty-one thousand, seven hundred ninety".