40563778 has 4 divisors (see below), whose sum is σ = 60845670. Its totient is φ = 20281888.

The previous prime is 40563713. The next prime is 40563793. The reversal of 40563778 is 87736504.

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

It can be written as a sum of positive squares in only one way, i.e., 38651089 + 1912689 = 6217^2 + 1383^2 .

It is a super-3 number, since 3×40563778³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 40563778.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10140943 + ... + 10140946.

Almost surely, 2^40563778 is an apocalyptic number.

40563778 is a deficient number, since it is larger than the sum of its proper divisors (20281892).

40563778 is a wasteful number, since it uses less digits than its factorization.

40563778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20281891.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 40563778 is about 6368.9699324145. The cubic root of 40563778 is about 343.5944438652.

The spelling of 40563778 in words is "forty million, five hundred sixty-three thousand, seven hundred seventy-eight".