40378565 has 8 divisors (see below), whose sum is σ = 48610968. Its totient is φ = 32198400.

The previous prime is 40378537. The next prime is 40378571. The reversal of 40378565 is 56587304.

It can be written as a sum of positive squares in 4 ways, for example, as 17956 + 40360609 = 134^2 + 6353^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40378565 - 2⁸ = 40378309 is a prime.

It is a super-2 number, since 2×40378565² = 3260857022918450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11336 + ... + 14465.

It is an arithmetic number, because the mean of its divisors is an integer number (6076371).

Almost surely, 2^40378565 is an apocalyptic number.

It is an amenable number.

40378565 is a deficient number, since it is larger than the sum of its proper divisors (8232403).

40378565 is a wasteful number, since it uses less digits than its factorization.

40378565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26119.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 40378565 is about 6354.4130334752. The cubic root of 40378565 is about 343.0706985933.

The spelling of 40378565 in words is "forty million, three hundred seventy-eight thousand, five hundred sixty-five".