428051780 has 48 divisors (see below), whose sum is σ = 974555904. Its totient is φ = 156988800.

The previous prime is 428051777. The next prime is 428051807. The reversal of 428051780 is 87150824.

It is a super-2 number, since 2×428051780² = 366456652722336800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 428051780.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33809 + ... + 44711.

It is an arithmetic number, because the mean of its divisors is an integer number (20303248).

Almost surely, 2^428051780 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 428051780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487277952).

428051780 is an abundant number, since it is smaller than the sum of its proper divisors (546504124).

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

428051780 is a wasteful number, since it uses less digits than its factorization.

428051780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11076 (or 11074 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 428051780 is about 20689.4122681143. The cubic root of 428051780 is about 753.6425941106.

The spelling of 428051780 in words is "four hundred twenty-eight million, fifty-one thousand, seven hundred eighty".