40157738 has 8 divisors (see below), whose sum is σ = 61061988. Its totient is φ = 19803744.

The previous prime is 40157713. The next prime is 40157753. The reversal of 40157738 is 83775104.

It can be written as a sum of positive squares in 2 ways, for example, as 40157569 + 169 = 6337^2 + 13^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40157738² = 3225287842553288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40157698 and 40157707.

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, 137381 + ... + 137672.

Almost surely, 2^40157738 is an apocalyptic number.

40157738 is a deficient number, since it is larger than the sum of its proper divisors (20904250).

40157738 is a wasteful number, since it uses less digits than its factorization.

40157738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275128.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 40157738 is about 6337.0133343713. The cubic root of 40157738 is about 342.4441466810. Note that the first 3 decimals are identical.

The spelling of 40157738 in words is "forty million, one hundred fifty-seven thousand, seven hundred thirty-eight".