42231780 has 120 divisors (see below), whose sum is σ = 134164800. Its totient is φ = 11119680.

The previous prime is 42231779. The next prime is 42231793. The reversal of 42231780 is 8713224.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 212121 + ... + 212319.

It is an arithmetic number, because the mean of its divisors is an integer number (1118040).

Almost surely, 2^42231780 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 42231780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67082400).

42231780 is an abundant number, since it is smaller than the sum of its proper divisors (91933020).

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

42231780 is a wasteful number, since it uses less digits than its factorization.

42231780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 42231780 is about 6498.5983104051. The cubic root of 42231780 is about 348.2409152247.

The spelling of 42231780 in words is "forty-two million, two hundred thirty-one thousand, seven hundred eighty".