40869520 has 40 divisors (see below), whose sum is σ = 95603256. Its totient is φ = 16247808.

The previous prime is 40869481. The next prime is 40869523. The reversal of 40869520 is 2596804.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18249984 + 22619536 = 4272^2 + 4756^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (40869523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12364 + ... + 15316.

Almost surely, 2^40869520 is an apocalyptic number.

40869520 is a gapful number since it is divisible by the number (40) 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 40869520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47801628).

40869520 is an abundant number, since it is smaller than the sum of its proper divisors (54733736).

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

40869520 is a wasteful number, since it uses less digits than its factorization.

40869520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139 (or 3133 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 40869520 is about 6392.9273419929. The cubic root of 40869520 is about 344.4555439442.

The spelling of 40869520 in words is "forty million, eight hundred sixty-nine thousand, five hundred twenty".