40581072 has 120 divisors (see below), whose sum is σ = 131229696. Its totient is φ = 11467008.

The previous prime is 40581067. The next prime is 40581097. The reversal of 40581072 is 27018504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127858 + ... + 128174.

Almost surely, 2^40581072 is an apocalyptic number.

40581072 is a gapful number since it is divisible by the number (42) 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 40581072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65614848).

40581072 is an abundant number, since it is smaller than the sum of its proper divisors (90648624).

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

40581072 is a wasteful number, since it uses less digits than its factorization.

40581072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 40581072 is about 6370.3274641105. The cubic root of 40581072 is about 343.6432663891.

Adding to 40581072 its reverse (27018504), we get a palindrome (67599576).

The spelling of 40581072 in words is "forty million, five hundred eighty-one thousand, seventy-two".