1209798772 has 24 divisors (see below), whose sum is σ = 2605721216. Its totient is φ = 478601568.

The previous prime is 1209798769. The next prime is 1209798797. The reversal of 1209798772 is 2778979021.

It is a super-3 number, since 3×1209798772³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1661448 + ... + 1662175.

Almost surely, 2^1209798772 is an apocalyptic number.

It is an amenable number.

1209798772 is an abundant number, since it is smaller than the sum of its proper divisors (1395922444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1209798772 is a wasteful number, since it uses less digits than its factorization.

1209798772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323647 (or 3323645 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 52.

The square root of 1209798772 is about 34782.1616924538. The cubic root of 1209798772 is about 1065.5431621399.

The spelling of 1209798772 in words is "one billion, two hundred nine million, seven hundred ninety-eight thousand, seven hundred seventy-two".