40157698 has 8 divisors (see below), whose sum is σ = 68841792. Its totient is φ = 17210436.

The previous prime is 40157687. The next prime is 40157699. The reversal of 40157698 is 89675104.

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

It is a super-2 number, since 2×40157698² = 3225281417318408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40157698.

It is not an unprimeable number, because it can be changed into a prime (40157699) 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, 1434190 + ... + 1434217.

It is an arithmetic number, because the mean of its divisors is an integer number (8605224).

Almost surely, 2^40157698 is an apocalyptic number.

40157698 is a deficient number, since it is larger than the sum of its proper divisors (28684094).

40157698 is a wasteful number, since it uses less digits than its factorization.

40157698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868416.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 40157698 is about 6337.0101783096. The cubic root of 40157698 is about 342.4440329813. Note that the first 3 decimals are identical.

The spelling of 40157698 in words is "forty million, one hundred fifty-seven thousand, six hundred ninety-eight".