40442197 has 8 divisors (see below), whose sum is σ = 41847552. Its totient is φ = 39043200.

The previous prime is 40442191. The next prime is 40442209. The reversal of 40442197 is 79124404.

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

It is a cyclic number.

It is not a de Polignac number, because 40442197 - 2¹⁹ = 39917909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40442191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13893 + ... + 16549.

It is an arithmetic number, because the mean of its divisors is an integer number (5230944).

Almost surely, 2^40442197 is an apocalyptic number.

It is an amenable number.

40442197 is a deficient number, since it is larger than the sum of its proper divisors (1405355).

40442197 is a wasteful number, since it uses less digits than its factorization.

40442197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3179.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 40442197 is about 6359.4179765133. The cubic root of 40442197 is about 343.2508174045.

It can be divided in two parts, 4044 and 2197, that added together give a square (6241 = 79²).

The spelling of 40442197 in words is "forty million, four hundred forty-two thousand, one hundred ninety-seven".