40198042 has 4 divisors (see below), whose sum is σ = 60297066. Its totient is φ = 20099020.

The previous prime is 40198033. The next prime is 40198097. The reversal of 40198042 is 24089104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 31371201 + 8826841 = 5601^2 + 2971^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40198042.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10049509 + ... + 10049512.

Almost surely, 2^40198042 is an apocalyptic number.

40198042 is a deficient number, since it is larger than the sum of its proper divisors (20099024).

40198042 is a wasteful number, since it uses less digits than its factorization.

40198042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20099023.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 40198042 is about 6340.1925838258. The cubic root of 40198042 is about 342.5586721728.

The spelling of 40198042 in words is "forty million, one hundred ninety-eight thousand, forty-two".