428503778404 has 81 divisors (see below), whose sum is σ = 863159322081. Its totient is φ = 186011704320.

The previous prime is 428503778377. The next prime is 428503778459. The reversal of 428503778404 is 404877305824.

The square root of 428503778404 is 654602.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 284620116004 + 143883662400 = 533498^2 + 379320^2 .

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 289333344 + ... + 289334824.

Almost surely, 2^428503778404 is an apocalyptic number.

428503778404 is the 654602-nd square number.

It is an amenable number.

428503778404 is an abundant number, since it is smaller than the sum of its proper divisors (434655543677).

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

428503778404 is a wasteful number, since it uses less digits than its factorization.

428503778404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 52.

The spelling of 428503778404 in words is "four hundred twenty-eight billion, five hundred three million, seven hundred seventy-eight thousand, four hundred four".