42278500 has 48 divisors (see below), whose sum is σ = 100743552. Its totient is φ = 15372000.

The previous prime is 42278497. The next prime is 42278501. The reversal of 42278500 is 587224.

It is a super-3 number, since 3×42278500³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (42278501) by changing a digit.

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, 1657 + ... + 9343.

It is an arithmetic number, because the mean of its divisors is an integer number (2098824).

Almost surely, 2^42278500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42278500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50371776).

42278500 is an abundant number, since it is smaller than the sum of its proper divisors (58465052).

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

42278500 is a wasteful number, since it uses less digits than its factorization.

42278500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7717 (or 7705 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 42278500 is about 6502.1919381083. The cubic root of 42278500 is about 348.3692847417.

It can be divided in two parts, 42278 and 500, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 42278500 in words is "forty-two million, two hundred seventy-eight thousand, five hundred".