40821093 has 12 divisors (see below), whose sum is σ = 59275008. Its totient is φ = 27070440.

The previous prime is 40821091. The next prime is 40821107. The reversal of 40821093 is 39012804.

It is not a de Polignac number, because 40821093 - 2¹ = 40821091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40821091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10155 + ... + 13592.

It is an arithmetic number, because the mean of its divisors is an integer number (4939584).

Almost surely, 2^40821093 is an apocalyptic number.

It is an amenable number.

40821093 is a deficient number, since it is larger than the sum of its proper divisors (18453915).

40821093 is a wasteful number, since it uses less digits than its factorization.

40821093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23944 (or 23941 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 40821093 is about 6389.1386743441. The cubic root of 40821093 is about 344.3194397319.

Adding to 40821093 its reverse (39012804), we get a palindrome (79833897).

The spelling of 40821093 in words is "forty million, eight hundred twenty-one thousand, ninety-three".