40290093 has 6 divisors (see below), whose sum is σ = 58196814. Its totient is φ = 26860056.

The previous prime is 40290083. The next prime is 40290149. The reversal of 40290093 is 39009204.

It can be written as a sum of positive squares in only one way, i.e., 32012964 + 8277129 = 5658^2 + 2877^2 .

It is not a de Polignac number, because 40290093 - 2¹⁰ = 40289069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40290023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2238330 + ... + 2238347.

It is an arithmetic number, because the mean of its divisors is an integer number (9699469).

Almost surely, 2^40290093 is an apocalyptic number.

It is an amenable number.

40290093 is a deficient number, since it is larger than the sum of its proper divisors (17906721).

40290093 is a wasteful number, since it uses less digits than its factorization.

40290093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4476683 (or 4476680 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 40290093 is about 6347.4477548067. The cubic root of 40290093 is about 342.8199521416.

Adding to 40290093 its reverse (39009204), we get a palindrome (79299297).

The spelling of 40290093 in words is "forty million, two hundred ninety thousand, ninety-three".