40890072 has 32 divisors (see below), whose sum is σ = 102800880. Its totient is φ = 13553280.

The previous prime is 40890061. The next prime is 40890077. The reversal of 40890072 is 27009804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40890077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363 + ... + 9050.

Almost surely, 2^40890072 is an apocalyptic number.

It is an amenable number.

40890072 is an abundant number, since it is smaller than the sum of its proper divisors (61910808).

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

40890072 is a wasteful number, since it uses less digits than its factorization.

40890072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9603 (or 9599 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 40890072 is about 6394.5345413095. The cubic root of 40890072 is about 344.5132728990.

Adding to 40890072 its reverse (27009804), we get a palindrome (67899876).

The spelling of 40890072 in words is "forty million, eight hundred ninety thousand, seventy-two".