1244398477 has 16 divisors (see below), whose sum is σ = 1438444800. Its totient is φ = 1054454400.

The previous prime is 1244398459. The next prime is 1244398489. The reversal of 1244398477 is 7748934421.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244398477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1244398477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244392477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797424 + ... + 798982.

It is an arithmetic number, because the mean of its divisors is an integer number (89902800).

Almost surely, 2^1244398477 is an apocalyptic number.

It is an amenable number.

1244398477 is a deficient number, since it is larger than the sum of its proper divisors (194046323).

1244398477 is a wasteful number, since it uses less digits than its factorization.

1244398477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796.

The product of its digits is 1354752, while the sum is 49.

The square root of 1244398477 is about 35276.0326142269. The cubic root of 1244398477 is about 1075.6058534024.

The spelling of 1244398477 in words is "one billion, two hundred forty-four million, three hundred ninety-eight thousand, four hundred seventy-seven".