40865280 has 160 divisors (see below), whose sum is σ = 138767904. Its totient is φ = 10223616.

The previous prime is 40865269. The next prime is 40865287. The reversal of 40865280 is 8256804.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×40865280² = 3339942218956800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40865287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130404 + ... + 130716.

Almost surely, 2^40865280 is an apocalyptic number.

40865280 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 40865280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69383952).

40865280 is an abundant number, since it is smaller than the sum of its proper divisors (97902624).

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

40865280 is a wasteful number, since it uses less digits than its factorization.

40865280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 40865280 is about 6392.5957169213. The cubic root of 40865280 is about 344.4436317089.

The spelling of 40865280 in words is "forty million, eight hundred sixty-five thousand, two hundred eighty".