1428764972 has 6 divisors (see below), whose sum is σ = 2500338708. Its totient is φ = 714382484.

The previous prime is 1428764969. The next prime is 1428764977. The reversal of 1428764972 is 2794678241.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1428764972.

It is not an unprimeable number, because it can be changed into a prime (1428764977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178595618 + ... + 178595625.

It is an arithmetic number, because the mean of its divisors is an integer number (416723118).

Almost surely, 2^1428764972 is an apocalyptic number.

It is an amenable number.

1428764972 is a deficient number, since it is larger than the sum of its proper divisors (1071573736).

1428764972 is a wasteful number, since it uses less digits than its factorization.

1428764972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357191247 (or 357191245 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 50.

The square root of 1428764972 is about 37799.0075531091. The cubic root of 1428764972 is about 1126.2987396513.

The spelling of 1428764972 in words is "one billion, four hundred twenty-eight million, seven hundred sixty-four thousand, nine hundred seventy-two".