42878730 has 32 divisors (see below), whose sum is σ = 104600448. Its totient is φ = 11246400.

The previous prime is 42878723. The next prime is 42878761. The reversal of 42878730 is 3787824.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 9886 + ... + 13545.

It is an arithmetic number, because the mean of its divisors is an integer number (3268764).

Almost surely, 2^42878730 is an apocalyptic number.

42878730 is an abundant number, since it is smaller than the sum of its proper divisors (61721718).

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

42878730 is a wasteful number, since it uses less digits than its factorization.

42878730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23502.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 42878730 is about 6548.1852447835. The cubic root of 42878730 is about 350.0101493655.

The spelling of 42878730 in words is "forty-two million, eight hundred seventy-eight thousand, seven hundred thirty".