144406777 has 8 divisors (see below), whose sum is σ = 145845000. Its totient is φ = 142975104.

The previous prime is 144406741. The next prime is 144406813. The reversal of 144406777 is 777604441.

It is an interprime number because it is at equal distance from previous prime (144406741) and next prime (144406813).

It can be written as a sum of positive squares in 4 ways, for example, as 1628176 + 142778601 = 1276^2 + 11949^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144406777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144406727) 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, 50613 + ... + 53389.

It is an arithmetic number, because the mean of its divisors is an integer number (18230625).

Almost surely, 2^144406777 is an apocalyptic number.

It is an amenable number.

144406777 is a deficient number, since it is larger than the sum of its proper divisors (1438223).

144406777 is a wasteful number, since it uses less digits than its factorization.

144406777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275.

The product of its (nonzero) digits is 131712, while the sum is 40.

The square root of 144406777 is about 12016.9370889591. The cubic root of 144406777 is about 524.6413598976.

The spelling of 144406777 in words is "one hundred forty-four million, four hundred six thousand, seven hundred seventy-seven".