42778750 has 40 divisors (see below), whose sum is σ = 91658160. Its totient is φ = 14664000.

The previous prime is 42778739. The next prime is 42778777. The reversal of 42778750 is 5787724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6306 + ... + 11194.

It is an arithmetic number, because the mean of its divisors is an integer number (2291454).

Almost surely, 2^42778750 is an apocalyptic number.

42778750 is an abundant number, since it is smaller than the sum of its proper divisors (48879410).

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

42778750 is an equidigital number, since it uses as much as digits as its factorization.

42778750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4918 (or 4903 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 42778750 is about 6540.5466132427. The cubic root of 42778750 is about 349.7378990102.

The spelling of 42778750 in words is "forty-two million, seven hundred seventy-eight thousand, seven hundred fifty".