40157739 has 6 divisors (see below), whose sum is σ = 58005636. Its totient is φ = 26771820.

The previous prime is 40157713. The next prime is 40157753. The reversal of 40157739 is 93775104.

It is a happy number.

It is not a de Polignac number, because 40157739 - 2¹⁶ = 40092203 is a prime.

It is a super-2 number, since 2×40157739² = 3225288003184242, which contains 22 as substring.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2230977 + ... + 2230994.

It is an arithmetic number, because the mean of its divisors is an integer number (9667606).

Almost surely, 2^40157739 is an apocalyptic number.

40157739 is a deficient number, since it is larger than the sum of its proper divisors (17847897).

40157739 is a wasteful number, since it uses less digits than its factorization.

40157739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461977 (or 4461974 counting only the distinct ones).

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

The square root of 40157739 is about 6337.0134132728. The cubic root of 40157739 is about 342.4441495235. Note that the first 3 decimals are identical.

The spelling of 40157739 in words is "forty million, one hundred fifty-seven thousand, seven hundred thirty-nine".