1201388772 has 48 divisors (see below), whose sum is σ = 2954246400. Its totient is φ = 378940320.

The previous prime is 1201388743. The next prime is 1201388777. The reversal of 1201388772 is 2778831021.

It is a self number, because there is not a number n which added to its sum of digits gives 1201388772.

It is not an unprimeable number, because it can be changed into a prime (1201388777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229747 + ... + 234917.

It is an arithmetic number, because the mean of its divisors is an integer number (61546800).

Almost surely, 2^1201388772 is an apocalyptic number.

1201388772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1201388772 is an abundant number, since it is smaller than the sum of its proper divisors (1752857628).

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

1201388772 is a wasteful number, since it uses less digits than its factorization.

1201388772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216 (or 6214 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 1201388772 is about 34661.0555523054. The cubic root of 1201388772 is about 1063.0683529372.

The spelling of 1201388772 in words is "one billion, two hundred one million, three hundred eighty-eight thousand, seven hundred seventy-two".