40078573 has 4 divisors (see below), whose sum is σ = 40286428. Its totient is φ = 39870720.

The previous prime is 40078513. The next prime is 40078589. The reversal of 40078573 is 37587004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7963684 + 32114889 = 2822^2 + 5667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40078573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40078513) 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, 103638 + ... + 104023.

It is an arithmetic number, because the mean of its divisors is an integer number (10071607).

Almost surely, 2^40078573 is an apocalyptic number.

It is an amenable number.

40078573 is a deficient number, since it is larger than the sum of its proper divisors (207855).

40078573 is a wasteful number, since it uses less digits than its factorization.

40078573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207854.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 40078573 is about 6330.7640139244. The cubic root of 40078573 is about 342.2189727715.

The spelling of 40078573 in words is "forty million, seventy-eight thousand, five hundred seventy-three".