40144786 has 16 divisors (see below), whose sum is σ = 69556320. Its totient is φ = 17174080.

The previous prime is 40144763. The next prime is 40144789. The reversal of 40144786 is 68744104.

It is a super-2 number, since 2×40144786² = 3223207685971592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (40144789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53296 + ... + 54043.

It is an arithmetic number, because the mean of its divisors is an integer number (4347270).

Almost surely, 2^40144786 is an apocalyptic number.

40144786 is a deficient number, since it is larger than the sum of its proper divisors (29411534).

40144786 is a wasteful number, since it uses less digits than its factorization.

40144786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107369.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 40144786 is about 6335.9913194385. The cubic root of 40144786 is about 342.4073267659.

The spelling of 40144786 in words is "forty million, one hundred forty-four thousand, seven hundred eighty-six".