40205378 has 4 divisors (see below), whose sum is σ = 60308070. Its totient is φ = 20102688.

The previous prime is 40205359. The next prime is 40205423. The reversal of 40205378 is 87350204.

It is a happy number.

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., 23746129 + 16459249 = 4873^2 + 4057^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40205378.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051343 + ... + 10051346.

Almost surely, 2^40205378 is an apocalyptic number.

40205378 is a deficient number, since it is larger than the sum of its proper divisors (20102692).

40205378 is a wasteful number, since it uses less digits than its factorization.

40205378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20102691.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 40205378 is about 6340.7710887557. The cubic root of 40205378 is about 342.5795094859.

The spelling of 40205378 in words is "forty million, two hundred five thousand, three hundred seventy-eight".