42987420 has 144 divisors (see below), whose sum is σ = 150870720. Its totient is φ = 9704448.

The previous prime is 42987403. The next prime is 42987431. The reversal of 42987420 is 2478924.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137184 + ... + 137496.

Almost surely, 2^42987420 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 42987420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75435360).

42987420 is an abundant number, since it is smaller than the sum of its proper divisors (107883300).

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

42987420 is a wasteful number, since it uses less digits than its factorization.

42987420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 42987420 is about 6556.4792381277. The cubic root of 42987420 is about 350.3056377858.

The spelling of 42987420 in words is "forty-two million, nine hundred eighty-seven thousand, four hundred twenty".