42128490 has 16 divisors (see below), whose sum is σ = 101108448. Its totient is φ = 11234256.

The previous prime is 42128477. The next prime is 42128549. The reversal of 42128490 is 9482124.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1404283 = 42128490 / (4 + 2 + 1 + 2 + 8 + 4 + 9 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702112 + ... + 702171.

It is an arithmetic number, because the mean of its divisors is an integer number (6319278).

Almost surely, 2^42128490 is an apocalyptic number.

42128490 is an abundant number, since it is smaller than the sum of its proper divisors (58979958).

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

42128490 is a wasteful number, since it uses less digits than its factorization.

42128490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404293.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 42128490 is about 6490.6463468595. The cubic root of 42128490 is about 347.9567755800.

The spelling of 42128490 in words is "forty-two million, one hundred twenty-eight thousand, four hundred ninety".