40987778 has 16 divisors (see below), whose sum is σ = 66588480. Its totient is φ = 18809616.

The previous prime is 40987777. The next prime is 40987781. The reversal of 40987778 is 87778904.

It is not an unprimeable number, because it can be changed into a prime (40987777) 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 7 ways as a sum of consecutive naturals, for example, 251 + ... + 9057.

It is an arithmetic number, because the mean of its divisors is an integer number (4161780).

Almost surely, 2^40987778 is an apocalyptic number.

40987778 is a deficient number, since it is larger than the sum of its proper divisors (25600702).

40987778 is a wasteful number, since it uses less digits than its factorization.

40987778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9001.

The product of its (nonzero) digits is 790272, while the sum is 50.

The square root of 40987778 is about 6402.1697884389. The cubic root of 40987778 is about 344.7874571281.

The spelling of 40987778 in words is "forty million, nine hundred eighty-seven thousand, seven hundred seventy-eight".