40047745 has 4 divisors (see below), whose sum is σ = 48057300. Its totient is φ = 32038192.

The previous prime is 40047731. The next prime is 40047751. The reversal of 40047745 is 54774004.

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 17313921 + 22733824 = 4161^2 + 4768^2 .

It is a cyclic number.

It is not a de Polignac number, because 40047745 - 2¹¹ = 40045697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4004770 + ... + 4004779.

It is an arithmetic number, because the mean of its divisors is an integer number (12014325).

Almost surely, 2^40047745 is an apocalyptic number.

It is an amenable number.

40047745 is a deficient number, since it is larger than the sum of its proper divisors (8009555).

40047745 is an equidigital number, since it uses as much as digits as its factorization.

40047745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8009554.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 40047745 is about 6328.3287683242. The cubic root of 40047745 is about 342.1312065678.

The spelling of 40047745 in words is "forty million, forty-seven thousand, seven hundred forty-five".