128404542 has 32 divisors (see below), whose sum is σ = 302966784. Its totient is φ = 35503200.

The previous prime is 128404537. The next prime is 128404543. The reversal of 128404542 is 245404821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128404543) 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, 48009 + ... + 50612.

It is an arithmetic number, because the mean of its divisors is an integer number (9467712).

Almost surely, 2^128404542 is an apocalyptic number.

128404542 is an abundant number, since it is smaller than the sum of its proper divisors (174562242).

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

128404542 is a wasteful number, since it uses less digits than its factorization.

128404542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98664.

The product of its (nonzero) digits is 10240, while the sum is 30.

The square root of 128404542 is about 11331.5727946301. The cubic root of 128404542 is about 504.4987897136.

The spelling of 128404542 in words is "one hundred twenty-eight million, four hundred four thousand, five hundred forty-two".