1013721028 has 12 divisors (see below), whose sum is σ = 1780559872. Its totient is φ = 504989640.

The previous prime is 1013721019. The next prime is 1013721029. The reversal of 1013721028 is 8201273101.

It is a happy number.

1013721028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1013720993 and 1013721011.

It is not an unprimeable number, because it can be changed into a prime (1013721029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466500 + ... + 468667.

Almost surely, 2^1013721028 is an apocalyptic number.

It is an amenable number.

1013721028 is a deficient number, since it is larger than the sum of its proper divisors (766838844).

1013721028 is a wasteful number, since it uses less digits than its factorization.

1013721028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935442 (or 935440 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1013721028 is about 31838.9859763153. The cubic root of 1013721028 is about 1004.5529155012.

Adding to 1013721028 its reverse (8201273101), we get a palindrome (9214994129).

It can be divided in two parts, 101372 and 1028, that added together give a square (102400 = 320²).

The spelling of 1013721028 in words is "one billion, thirteen million, seven hundred twenty-one thousand, twenty-eight".