8969940 has 180 divisors, whose sum is σ = 33022836. Its totient is φ = 2032128.

The previous prime is 8969923. The next prime is 8969959. The reversal of 8969940 is 499698.

8969940 = T₁₄₁ + T₁₄₂ + ... + T₃₈₃.

8969940 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1285956 + 7683984 = 1134^2 + 2772^2 .

It is a tau number, because it is divible by the number of its divisors (180).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 79324 + ... + 79436.

Almost surely, 2^8969940 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 8969940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16511418).

8969940 is an abundant number, since it is smaller than the sum of its proper divisors (24052896).

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

8969940 is a wasteful number, since it uses less digits than its factorization.

8969940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 8969940 is about 2994.9858096492. The cubic root of 8969940 is about 207.7765413314.

The spelling of 8969940 in words is "eight million, nine hundred sixty-nine thousand, nine hundred forty".