42344820 has 108 divisors (see below), whose sum is σ = 149447844. Its totient is φ = 9676800.

The previous prime is 42344803. The next prime is 42344837. The reversal of 42344820 is 2844324.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42344803) and next prime (42344837).

It can be written as a sum of positive squares in 2 ways, for example, as 19820304 + 22524516 = 4452^2 + 4746^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6420 + ... + 11220.

Almost surely, 2^42344820 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 42344820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74723922).

42344820 is an abundant number, since it is smaller than the sum of its proper divisors (107103024).

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

42344820 is a wasteful number, since it uses less digits than its factorization.

42344820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830 (or 4818 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 42344820 is about 6507.2897584171. The cubic root of 42344820 is about 348.5513456071.

The spelling of 42344820 in words is "forty-two million, three hundred forty-four thousand, eight hundred twenty".