42278370 has 64 divisors (see below), whose sum is σ = 107495424. Its totient is φ = 10619840.

The previous prime is 42278359. The next prime is 42278399. The reversal of 42278370 is 7387224.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48559 + ... + 49421.

It is an arithmetic number, because the mean of its divisors is an integer number (1679616).

Almost surely, 2^42278370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42278370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53747712).

42278370 is an abundant number, since it is smaller than the sum of its proper divisors (65217054).

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

42278370 is a wasteful number, since it uses less digits than its factorization.

42278370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 42278370 is about 6502.1819414716. The cubic root of 42278370 is about 348.3689276804.

The spelling of 42278370 in words is "forty-two million, two hundred seventy-eight thousand, three hundred seventy".