42434340 has 48 divisors (see below), whose sum is σ = 127958208. Its totient is φ = 10445184.

The previous prime is 42434339. The next prime is 42434341. The reversal of 42434340 is 4343424.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42434339) and next prime (42434341).

It is a super-2 number, since 2×42434340² = 3601346422471200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42434340.

It is not an unprimeable number, because it can be changed into a prime (42434341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26422 + ... + 27981.

It is an arithmetic number, because the mean of its divisors is an integer number (2665796).

Almost surely, 2^42434340 is an apocalyptic number.

It is an amenable number.

42434340 is an abundant number, since it is smaller than the sum of its proper divisors (85523868).

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

42434340 is a wasteful number, since it uses less digits than its factorization.

42434340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54428 (or 54426 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 42434340 is about 6514.1645665427. The cubic root of 42434340 is about 348.7967936081.

Adding to 42434340 its reverse (4343424), we get a palindrome (46777764).

The spelling of 42434340 in words is "forty-two million, four hundred thirty-four thousand, three hundred forty".