42219400 has 24 divisors (see below), whose sum is σ = 98160570. Its totient is φ = 16887680.

The previous prime is 42219383. The next prime is 42219403. The reversal of 42219400 is 491224.

It can be written as a sum of positive squares in 3 ways, for example, as 30536676 + 11682724 = 5526^2 + 3418^2 .

It is not an unprimeable number, because it can be changed into a prime (42219403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105349 + ... + 105748.

Almost surely, 2^42219400 is an apocalyptic number.

42219400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42219400 is an abundant number, since it is smaller than the sum of its proper divisors (55941170).

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

42219400 is a wasteful number, since it uses less digits than its factorization.

42219400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211113 (or 211104 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 42219400 is about 6497.6457274924. The cubic root of 42219400 is about 348.2068836346.

The spelling of 42219400 in words is "forty-two million, two hundred nineteen thousand, four hundred".