428241978 has 40 divisors (see below), whose sum is σ = 960804372. Its totient is φ = 142565184.

The previous prime is 428241977. The next prime is 428241997. The reversal of 428241978 is 879142824.

It can be written as a sum of positive squares in 2 ways, for example, as 418488849 + 9753129 = 20457^2 + 3123^2 .

It is not an unprimeable number, because it can be changed into a prime (428241977) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 199326 + ... + 201462.

Almost surely, 2^428241978 is an apocalyptic number.

428241978 is an abundant number, since it is smaller than the sum of its proper divisors (532562394).

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

428241978 is a wasteful number, since it uses less digits than its factorization.

428241978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388 (or 3379 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 428241978 is about 20694.0082632631. The cubic root of 428241978 is about 753.7542006152.

The spelling of 428241978 in words is "four hundred twenty-eight million, two hundred forty-one thousand, nine hundred seventy-eight".