42454740 has 96 divisors (see below), whose sum is σ = 126443520. Its totient is φ = 10613376.

The previous prime is 42454733. The next prime is 42454777. The reversal of 42454740 is 4745424.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 42454698 and 42454707.

It is a congruent 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, 190269 + ... + 190491.

It is an arithmetic number, because the mean of its divisors is an integer number (1317120).

Almost surely, 2^42454740 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 42454740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63221760).

42454740 is an abundant number, since it is smaller than the sum of its proper divisors (83988780).

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

42454740 is a wasteful number, since it uses less digits than its factorization.

42454740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 30.

The square root of 42454740 is about 6515.7301969925. The cubic root of 42454740 is about 348.8526784933.

The spelling of 42454740 in words is "forty-two million, four hundred fifty-four thousand, seven hundred forty".