40581364 has 12 divisors (see below), whose sum is σ = 72077824. Its totient is φ = 19987704.

The previous prime is 40581337. The next prime is 40581403. The reversal of 40581364 is 46318504.

It is a happy number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75444 + ... + 75979.

Almost surely, 2^40581364 is an apocalyptic number.

It is an amenable number.

40581364 is a deficient number, since it is larger than the sum of its proper divisors (31496460).

40581364 is a wasteful number, since it uses less digits than its factorization.

40581364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151494 (or 151492 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 40581364 is about 6370.3503828282. The cubic root of 40581364 is about 343.6440906123.

Adding to 40581364 its reverse (46318504), we get a palindrome (86899868).

The spelling of 40581364 in words is "forty million, five hundred eighty-one thousand, three hundred sixty-four".