40890538 has 8 divisors (see below), whose sum is σ = 66053988. Its totient is φ = 18872544.

The previous prime is 40890529. The next prime is 40890539. The reversal of 40890538 is 83509804.

It can be written as a sum of positive squares in 2 ways, for example, as 39904489 + 986049 = 6317^2 + 993^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 40890497 and 40890506.

It is not an unprimeable number, because it can be changed into a prime (40890539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786331 + ... + 786382.

Almost surely, 2^40890538 is an apocalyptic number.

40890538 is a deficient number, since it is larger than the sum of its proper divisors (25163450).

40890538 is a wasteful number, since it uses less digits than its factorization.

40890538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572728.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 40890538 is about 6394.5709785724. The cubic root of 40890538 is about 344.5145816322.

The spelling of 40890538 in words is "forty million, eight hundred ninety thousand, five hundred thirty-eight".