42819804 has 144 divisors (see below), whose sum is σ = 123492096. Its totient is φ = 12441600.

The previous prime is 42819797. The next prime is 42819811. The reversal of 42819804 is 40891824.

It is an interprime number because it is at equal distance from previous prime (42819797) and next prime (42819811).

It is a super-2 number, since 2×42819804² = 3667071229196832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 701934 + ... + 701994.

It is an arithmetic number, because the mean of its divisors is an integer number (857584).

Almost surely, 2^42819804 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 42819804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61746048).

42819804 is an abundant number, since it is smaller than the sum of its proper divisors (80672292).

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

42819804 is a wasteful number, since it uses less digits than its factorization.

42819804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 42819804 is about 6543.6842833376. The cubic root of 42819804 is about 349.8497423052.

The spelling of 42819804 in words is "forty-two million, eight hundred nineteen thousand, eight hundred four".