40147394 has 32 divisors (see below), whose sum is σ = 71352576. Its totient is φ = 16585920.

The previous prime is 40147391. The next prime is 40147403. The reversal of 40147394 is 49374104.

It is a happy number.

It is a super-2 number, since 2×40147394² = 3223626489982472, 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 40147394.

It is not an unprimeable number, because it can be changed into a prime (40147391) 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 15 ways as a sum of consecutive naturals, for example, 44819 + ... + 45705.

It is an arithmetic number, because the mean of its divisors is an integer number (2229768).

Almost surely, 2^40147394 is an apocalyptic number.

40147394 is a deficient number, since it is larger than the sum of its proper divisors (31205182).

40147394 is a wasteful number, since it uses less digits than its factorization.

40147394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 40147394 is about 6336.1971244588. The cubic root of 40147394 is about 342.4147414189.

The spelling of 40147394 in words is "forty million, one hundred forty-seven thousand, three hundred ninety-four".