780000457728 has 352 divisors, whose sum is σ = 2220126547968. Its totient is φ = 243051724800.

The previous prime is 780000457667. The next prime is 780000457741. The reversal of 780000457728 is 827754000087.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 417781851 + ... + 417783717.

Almost surely, 2^780000457728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 780000457728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1110063273984).

780000457728 is an abundant number, since it is smaller than the sum of its proper divisors (1440126090240).

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

780000457728 is a wasteful number, since it uses less digits than its factorization.

780000457728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069 (or 2051 counting only the distinct ones).

The product of its (nonzero) digits is 878080, while the sum is 48.

The spelling of 780000457728 in words is "seven hundred eighty billion, four hundred fifty-seven thousand, seven hundred twenty-eight".