42729472 has 38 divisors (see below), whose sum is σ = 85983068. Its totient is φ = 21233664.

The previous prime is 42729437. The next prime is 42729473. The reversal of 42729472 is 27492724.

It is not an unprimeable number, because it can be changed into a prime (42729473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262063 + ... + 262225.

Almost surely, 2^42729472 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 42729472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42991534).

42729472 is an abundant number, since it is smaller than the sum of its proper divisors (43253596).

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

42729472 is an frugal number, since it uses more digits than its factorization.

42729472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 165 counting only the distinct ones).

The product of its digits is 56448, while the sum is 37.

The square root of 42729472 is about 6536.7784114195. The cubic root of 42729472 is about 349.6035565620.

The spelling of 42729472 in words is "forty-two million, seven hundred twenty-nine thousand, four hundred seventy-two".