42156928 has 64 divisors (see below), whose sum is σ = 93024000. Its totient is φ = 18869760.

The previous prime is 42156901. The next prime is 42156937. The reversal of 42156928 is 82965124.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111043 + ... + 111421.

It is an arithmetic number, because the mean of its divisors is an integer number (1453500).

Almost surely, 2^42156928 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 42156928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46512000).

42156928 is an abundant number, since it is smaller than the sum of its proper divisors (50867072).

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

42156928 is a wasteful number, since it uses less digits than its factorization.

42156928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 471 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 42156928 is about 6492.8366682060. The cubic root of 42156928 is about 348.0350517387.

The spelling of 42156928 in words is "forty-two million, one hundred fifty-six thousand, nine hundred twenty-eight".