42431620 has 96 divisors (see below), whose sum is σ = 113218560. Its totient is φ = 12973440.

The previous prime is 42431567. The next prime is 42431651. The reversal of 42431620 is 2613424.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 42431591 and 42431600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90627 + ... + 91093.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^42431620 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 42431620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56609280).

42431620 is an abundant number, since it is smaller than the sum of its proper divisors (70786940).

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

42431620 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 12 representation: 42431620 = (12263404)₁₂.

42431620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 42431620 is about 6513.9557873845. The cubic root of 42431620 is about 348.7893409369.

The spelling of 42431620 in words is "forty-two million, four hundred thirty-one thousand, six hundred twenty".