40439194 has 4 divisors (see below), whose sum is σ = 60658794. Its totient is φ = 20219596.

The previous prime is 40439183. The next prime is 40439219. The reversal of 40439194 is 49193404.

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., 39853969 + 585225 = 6313^2 + 765^2 .

It is a super-2 number, since 2×40439194² = 3270656822739272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10109797 + ... + 10109800.

Almost surely, 2^40439194 is an apocalyptic number.

40439194 is a deficient number, since it is larger than the sum of its proper divisors (20219600).

40439194 is a wasteful number, since it uses less digits than its factorization.

40439194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20219599.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 40439194 is about 6359.1818656176. The cubic root of 40439194 is about 343.2423212644.

The spelling of 40439194 in words is "forty million, four hundred thirty-nine thousand, one hundred ninety-four".