40078093 has 4 divisors (see below), whose sum is σ = 43721568. Its totient is φ = 36434620.

The previous prime is 40078091. The next prime is 40078109. The reversal of 40078093 is 39087004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40078093 - 2¹ = 40078091 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40078091) 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, 1821721 + ... + 1821742.

It is an arithmetic number, because the mean of its divisors is an integer number (10930392).

Almost surely, 2^40078093 is an apocalyptic number.

It is an amenable number.

40078093 is a deficient number, since it is larger than the sum of its proper divisors (3643475).

40078093 is a wasteful number, since it uses less digits than its factorization.

40078093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3643474.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 40078093 is about 6330.7261036946. The cubic root of 40078093 is about 342.2176065738.

It can be divided in two parts, 4007 and 8093, that added together give a square (12100 = 110²).

The spelling of 40078093 in words is "forty million, seventy-eight thousand, ninety-three".