40157769 has 4 divisors (see below), whose sum is σ = 53543696. Its totient is φ = 26771844.

The previous prime is 40157759. The next prime is 40157861. The reversal of 40157769 is 96775104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40157769 - 2⁴ = 40157753 is a prime.

It is a super-2 number, since 2×40157769² = 3225292822114722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40157759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6692959 + ... + 6692964.

It is an arithmetic number, because the mean of its divisors is an integer number (13385924).

Almost surely, 2^40157769 is an apocalyptic number.

It is an amenable number.

40157769 is a deficient number, since it is larger than the sum of its proper divisors (13385927).

40157769 is a wasteful number, since it uses less digits than its factorization.

40157769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13385926.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 40157769 is about 6337.0157803181. The cubic root of 40157769 is about 342.4442347982. Note that the first 3 decimals are identical.

The spelling of 40157769 in words is "forty million, one hundred fifty-seven thousand, seven hundred sixty-nine".