427145840 has 160 divisors (see below), whose sum is σ = 1162425600. Its totient is φ = 144322560.

The previous prime is 427145833. The next prime is 427145879. The reversal of 427145840 is 48541724.

It is a self number, because there is not a number n which added to its sum of digits gives 427145840.

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, 986264 + ... + 986696.

It is an arithmetic number, because the mean of its divisors is an integer number (7265160).

Almost surely, 2^427145840 is an apocalyptic number.

427145840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 427145840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (581212800).

427145840 is an abundant number, since it is smaller than the sum of its proper divisors (735279760).

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

427145840 is a wasteful number, since it uses less digits than its factorization.

427145840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 427145840 is about 20667.5068646414. The cubic root of 427145840 is about 753.1105422751.

The spelling of 427145840 in words is "four hundred twenty-seven million, one hundred forty-five thousand, eight hundred forty".