772478028 has 72 divisors (see below), whose sum is σ = 2362887072. Its totient is φ = 207724032.

The previous prime is 772477999. The next prime is 772478029. The reversal of 772478028 is 820874277.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (772478029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85875 + ... + 94442.

It is an arithmetic number, because the mean of its divisors is an integer number (32817876).

Almost surely, 2^772478028 is an apocalyptic number.

It is an amenable number.

772478028 is an abundant number, since it is smaller than the sum of its proper divisors (1590409044).

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

772478028 is a wasteful number, since it uses less digits than its factorization.

772478028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180351 (or 180346 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 772478028 is about 27793.4889497522. The cubic root of 772478028 is about 917.5478286337.

The spelling of 772478028 in words is "seven hundred seventy-two million, four hundred seventy-eight thousand, twenty-eight".