40157793 has 24 divisors (see below), whose sum is σ = 65188032. Its totient is φ = 23636448.

The previous prime is 40157759. The next prime is 40157861. The reversal of 40157793 is 39775104.

It is a happy number.

It is not a de Polignac number, because 40157793 - 2¹² = 40153697 is a prime.

It is a super-2 number, since 2×40157793² = 3225296677261698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40157713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4771 + ... + 10152.

It is an arithmetic number, because the mean of its divisors is an integer number (2716168).

Almost surely, 2^40157793 is an apocalyptic number.

It is an amenable number.

40157793 is a deficient number, since it is larger than the sum of its proper divisors (25030239).

40157793 is a wasteful number, since it uses less digits than its factorization.

40157793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14965 (or 14962 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 40157793 is about 6337.0176739536. The cubic root of 40157793 is about 342.4443030180. Note that the first 3 decimals are identical.

The spelling of 40157793 in words is "forty million, one hundred fifty-seven thousand, seven hundred ninety-three".