1020402772 has 12 divisors (see below), whose sum is σ = 1788495156. Its totient is φ = 509404160.

The previous prime is 1020402743. The next prime is 1020402863. The reversal of 1020402772 is 2772040201.

It can be written as a sum of positive squares in 2 ways, for example, as 434472336 + 585930436 = 20844^2 + 24206^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196423 + ... + 201550.

It is an arithmetic number, because the mean of its divisors is an integer number (149041263).

Almost surely, 2^1020402772 is an apocalyptic number.

It is an amenable number.

1020402772 is a deficient number, since it is larger than the sum of its proper divisors (768092384).

1020402772 is a wasteful number, since it uses less digits than its factorization.

1020402772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398618 (or 398616 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 1020402772 is about 31943.7438632356. The cubic root of 1020402772 is about 1006.7551886738.

Adding to 1020402772 its reverse (2772040201), we get a palindrome (3792442973).

The spelling of 1020402772 in words is "one billion, twenty million, four hundred two thousand, seven hundred seventy-two".