9739890 has 48 divisors (see below), whose sum is σ = 26148096. Its totient is φ = 2512800.

The previous prime is 9739871. The next prime is 9739901. The reversal of 9739890 is 989379.

It is a happy number.

9739890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 1045 + ... + 4535.

It is an arithmetic number, because the mean of its divisors is an integer number (544752).

Almost surely, 2^9739890 is an apocalyptic number.

9739890 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 9739890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13074048).

9739890 is an abundant number, since it is smaller than the sum of its proper divisors (16408206).

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

9739890 is a wasteful number, since it uses less digits than its factorization.

9739890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535 (or 3532 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 9739890 is about 3120.8796836789. The cubic root of 9739890 is about 213.5590682415.

The spelling of 9739890 in words is "nine million, seven hundred thirty-nine thousand, eight hundred ninety".