428440698 has 128 divisors (see below), whose sum is σ = 1172067840. Its totient is φ = 113218560.

The previous prime is 428440697. The next prime is 428440763. The reversal of 428440698 is 896044824.

It is a super-2 number, since 2×428440698² = 367122863405454408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428440697) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 391440 + ... + 392532.

It is an arithmetic number, because the mean of its divisors is an integer number (9156780).

Almost surely, 2^428440698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428440698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (586033920).

428440698 is an abundant number, since it is smaller than the sum of its proper divisors (743627142).

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

428440698 is a wasteful number, since it uses less digits than its factorization.

428440698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189 (or 1183 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 428440698 is about 20698.8090961775. The cubic root of 428440698 is about 753.8707724598.

The spelling of 428440698 in words is "four hundred twenty-eight million, four hundred forty thousand, six hundred ninety-eight".