1428623957672 has 8 divisors (see below), whose sum is σ = 2678669920650. Its totient is φ = 714311978832.

The previous prime is 1428623957653. The next prime is 1428623957687. The reversal of 1428623957672 is 2767593268241.

It can be written as a sum of positive squares in only one way, i.e., 979715917636 + 448908040036 = 989806^2 + 670006^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89288997347 + ... + 89288997362.

Almost surely, 2^{1428623957672} is an apocalyptic number.

It is an amenable number.

1428623957672 is a deficient number, since it is larger than the sum of its proper divisors (1250045962978).

1428623957672 is a wasteful number, since it uses less digits than its factorization.

1428623957672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178577994715 (or 178577994711 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 62.

The spelling of 1428623957672 in words is "one trillion, four hundred twenty-eight billion, six hundred twenty-three million, nine hundred fifty-seven thousand, six hundred seventy-two".