42800000 has 96 divisors (see below), whose sum is σ = 107571240. Its totient is φ = 16960000.

The previous prime is 42799949. The next prime is 42800039. The reversal of 42800000 is 824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399947 + ... + 400053.

Almost surely, 2^42800000 is an apocalyptic number.

42800000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53785620).

42800000 is an abundant number, since it is smaller than the sum of its proper divisors (64771240).

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

42800000 is an frugal number, since it uses more digits than its factorization.

42800000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 42800000 is about 6542.1708935185. The cubic root of 42800000 is about 349.7957992535.

Adding to 42800000 its reverse (824), we get a palindrome (42800824).

The spelling of 42800000 in words is "forty-two million, eight hundred thousand".