1445220477 has 24 divisors (see below), whose sum is σ = 2105194104. Its totient is φ = 955367424.

The previous prime is 1445220457. The next prime is 1445220529. The reversal of 1445220477 is 7740225441.

1445220477 is a `hidden beast` number, since 1 + 445 + 2 + 204 + 7 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2056356 + 1443164121 = 1434^2 + 37989^2 .

It is not a de Polignac number, because 1445220477 - 2⁷ = 1445220349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445220457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 611983 + ... + 614339.

It is an arithmetic number, because the mean of its divisors is an integer number (87716421).

Almost surely, 2^1445220477 is an apocalyptic number.

It is an amenable number.

1445220477 is a deficient number, since it is larger than the sum of its proper divisors (659973627).

1445220477 is a wasteful number, since it uses less digits than its factorization.

1445220477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909 (or 2906 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 36.

The square root of 1445220477 is about 38016.0555160579. The cubic root of 1445220477 is about 1130.6062158249.

The spelling of 1445220477 in words is "one billion, four hundred forty-five million, two hundred twenty thousand, four hundred seventy-seven".