42231840 has 96 divisors (see below), whose sum is σ = 152046720. Its totient is φ = 9652224.

The previous prime is 42231823. The next prime is 42231853. The reversal of 42231840 is 4813224.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 42231840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2925 + ... + 9644.

It is an arithmetic number, because the mean of its divisors is an integer number (1583820).

Almost surely, 2^42231840 is an apocalyptic number.

42231840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42231840 is an abundant number, since it is smaller than the sum of its proper divisors (109814880).

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

42231840 is a wasteful number, since it uses less digits than its factorization.

42231840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12594 (or 12586 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 42231840 is about 6498.6029267836. The cubic root of 42231840 is about 348.2410801435.

It can be divided in two parts, 42231 and 840, that added together give a triangular number (43071 = T₂₉₃).

The spelling of 42231840 in words is "forty-two million, two hundred thirty-one thousand, eight hundred forty".