40978018 has 8 divisors (see below), whose sum is σ = 63128412. Its totient is φ = 19935216.

The previous prime is 40977997. The next prime is 40978027. The reversal of 40978018 is 81087904.

It can be written as a sum of positive squares in 2 ways, for example, as 37124649 + 3853369 = 6093^2 + 1963^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (37).

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 in 3 ways as a sum of consecutive naturals, for example, 276805 + ... + 276952.

Almost surely, 2^40978018 is an apocalyptic number.

40978018 is a deficient number, since it is larger than the sum of its proper divisors (22150394).

40978018 is a wasteful number, since it uses less digits than its factorization.

40978018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553796.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 40978018 is about 6401.4075014797. The cubic root of 40978018 is about 344.7600880531.

The spelling of 40978018 in words is "forty million, nine hundred seventy-eight thousand, eighteen".