42030640 has 40 divisors (see below), whose sum is σ = 98074080. Its totient is φ = 16751616.

The previous prime is 42030629. The next prime is 42030649. The reversal of 42030640 is 4603024.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (42030649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26181 + ... + 27739.

It is an arithmetic number, because the mean of its divisors is an integer number (2451852).

Almost surely, 2^42030640 is an apocalyptic number.

42030640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42030640 is an abundant number, since it is smaller than the sum of its proper divisors (56043440).

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

42030640 is a wasteful number, since it uses less digits than its factorization.

42030640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909 (or 1903 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 42030640 is about 6483.1041947512. The cubic root of 42030640 is about 347.6871720819.

Adding to 42030640 its reverse (4603024), we get a palindrome (46633664).

The spelling of 42030640 in words is "forty-two million, thirty thousand, six hundred forty".