1020728872 has 8 divisors (see below), whose sum is σ = 1913866650. Its totient is φ = 510364432.

The previous prime is 1020728869. The next prime is 1020728893. The reversal of 1020728872 is 2788270201.

It is a happy number.

1020728872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 896762916 + 123965956 = 29946^2 + 11134^2 .

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

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63795547 + ... + 63795562.

Almost surely, 2^1020728872 is an apocalyptic number.

It is an amenable number.

1020728872 is a deficient number, since it is larger than the sum of its proper divisors (893137778).

1020728872 is a wasteful number, since it uses less digits than its factorization.

1020728872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127591115 (or 127591111 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 1020728872 is about 31948.8477413505. The cubic root of 1020728872 is about 1006.8624234211.

The spelling of 1020728872 in words is "one billion, twenty million, seven hundred twenty-eight thousand, eight hundred seventy-two".