42387972 has 48 divisors (see below), whose sum is σ = 108343872. Its totient is φ = 12791680.

The previous prime is 42387949. The next prime is 42387979. The reversal of 42387972 is 27978324.

It is not an unprimeable number, because it can be changed into a prime (42387979) 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, 41338 + ... + 42350.

It is an arithmetic number, because the mean of its divisors is an integer number (2257164).

Almost surely, 2^42387972 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 42387972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54171936).

42387972 is an abundant number, since it is smaller than the sum of its proper divisors (65955900).

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

42387972 is a wasteful number, since it uses less digits than its factorization.

42387972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348 (or 1346 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 42387972 is about 6510.6045802214. The cubic root of 42387972 is about 348.6697038969.

The spelling of 42387972 in words is "forty-two million, three hundred eighty-seven thousand, nine hundred seventy-two".