40921394 has 4 divisors (see below), whose sum is σ = 61382094. Its totient is φ = 20460696.

The previous prime is 40921381. The next prime is 40921427. The reversal of 40921394 is 49312904.

It is a happy number.

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., 31080625 + 9840769 = 5575^2 + 3137^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40921394.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10230347 + ... + 10230350.

Almost surely, 2^40921394 is an apocalyptic number.

40921394 is a deficient number, since it is larger than the sum of its proper divisors (20460700).

40921394 is a wasteful number, since it uses less digits than its factorization.

40921394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20460699.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 40921394 is about 6396.9831952257. The cubic root of 40921394 is about 344.6012167454.

The spelling of 40921394 in words is "forty million, nine hundred twenty-one thousand, three hundred ninety-four".