42491328 has 168 divisors, whose sum is σ = 129722880. Its totient is φ = 12249600.

The previous prime is 42491303. The next prime is 42491341. The reversal of 42491328 is 82319424.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 720163 + ... + 720221.

It is an arithmetic number, because the mean of its divisors is an integer number (772160).

Almost surely, 2^42491328 is an apocalyptic number.

42491328 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42491328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64861440).

42491328 is an abundant number, since it is smaller than the sum of its proper divisors (87231552).

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

42491328 is a wasteful number, since it uses less digits than its factorization.

42491328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 106 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 42491328 is about 6518.5372592323. The cubic root of 42491328 is about 348.9528648477.

The spelling of 42491328 in words is "forty-two million, four hundred ninety-one thousand, three hundred twenty-eight".