9945156 has 48 divisors (see below), whose sum is σ = 25680704. Its totient is φ = 2975616.

The previous prime is 9945149. The next prime is 9945157. The reversal of 9945156 is 6515499.

It is a super-2 number, since 2×9945156² = 197812255728672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9945157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4911 + ... + 6633.

Almost surely, 2^9945156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9945156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12840352).

9945156 is an abundant number, since it is smaller than the sum of its proper divisors (15735548).

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

9945156 is a wasteful number, since it uses less digits than its factorization.

9945156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780 (or 1778 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 9945156 is about 3153.5941400250. The cubic root of 9945156 is about 215.0488873867.

It can be divided in two parts, 9945 and 156, that added together give a palindrome (10101).

The spelling of 9945156 in words is "nine million, nine hundred forty-five thousand, one hundred fifty-six".