40445280 has 72 divisors (see below), whose sum is σ = 138024432. Its totient is φ = 10785024.

The previous prime is 40445269. The next prime is 40445303. The reversal of 40445280 is 8254404.

It is a tau number, because it is divible by the number of its divisors (72).

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12604 + ... + 15483.

It is an arithmetic number, because the mean of its divisors is an integer number (1917006).

Almost surely, 2^40445280 is an apocalyptic number.

40445280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40445280 is an abundant number, since it is smaller than the sum of its proper divisors (97579152).

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

40445280 is a wasteful number, since it uses less digits than its factorization.

40445280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28108 (or 28097 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 40445280 is about 6359.6603682901. The cubic root of 40445280 is about 343.2595394445.

Adding to 40445280 its reverse (8254404), we get a palindrome (48699684).

The spelling of 40445280 in words is "forty million, four hundred forty-five thousand, two hundred eighty".