40443978 has 16 divisors (see below), whose sum is σ = 81096480. Its totient is φ = 13446576.

The previous prime is 40443937. The next prime is 40444007. The reversal of 40443978 is 87934404.

It is a super-3 number, since 3×40443978³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6108 + ... + 10871.

It is an arithmetic number, because the mean of its divisors is an integer number (5068530).

Almost surely, 2^40443978 is an apocalyptic number.

40443978 is an abundant number, since it is smaller than the sum of its proper divisors (40652502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40443978 is a wasteful number, since it uses less digits than its factorization.

40443978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17381.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 40443978 is about 6359.5580035094. The cubic root of 40443978 is about 343.2558560422.

The spelling of 40443978 in words is "forty million, four hundred forty-three thousand, nine hundred seventy-eight".