40172765 has 4 divisors (see below), whose sum is σ = 48207324. Its totient is φ = 32138208.

The previous prime is 40172753. The next prime is 40172771. The reversal of 40172765 is 56727104.

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 12652249 + 27520516 = 3557^2 + 5246^2 .

It is a cyclic number.

It is not a de Polignac number, because 40172765 - 2⁴ = 40172749 is a prime.

It is a super-2 number, since 2×40172765² = 3227702095490450, 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 3 ways as a sum of consecutive naturals, for example, 4017272 + ... + 4017281.

It is an arithmetic number, because the mean of its divisors is an integer number (12051831).

Almost surely, 2^40172765 is an apocalyptic number.

It is an amenable number.

40172765 is a deficient number, since it is larger than the sum of its proper divisors (8034559).

40172765 is an equidigital number, since it uses as much as digits as its factorization.

40172765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8034558.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 40172765 is about 6338.1988766526. The cubic root of 40172765 is about 342.4868554815.

Adding to 40172765 its reverse (56727104), we get a palindrome (96899869).

The spelling of 40172765 in words is "forty million, one hundred seventy-two thousand, seven hundred sixty-five".