41809440 has 48 divisors (see below), whose sum is σ = 131701248. Its totient is φ = 11149056.

The previous prime is 41809433. The next prime is 41809487. The reversal of 41809440 is 4490814.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×41809440² = 3496058546227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 41809398 and 41809407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43072 + ... + 44031.

It is an arithmetic number, because the mean of its divisors is an integer number (2743776).

Almost surely, 2^41809440 is an apocalyptic number.

41809440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

41809440 is an abundant number, since it is smaller than the sum of its proper divisors (89891808).

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

41809440 is a wasteful number, since it uses less digits than its factorization.

41809440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87121 (or 87113 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 41809440 is about 6466.0219609896. The cubic root of 41809440 is about 347.0761597595.

The spelling of 41809440 in words is "forty-one million, eight hundred nine thousand, four hundred forty".