427073640 has 128 divisors (see below), whose sum is σ = 1541376000. Its totient is φ = 92475648.

The previous prime is 427073593. The next prime is 427073693. The reversal of 427073640 is 46370724.

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, 2581 + ... + 29339.

It is an arithmetic number, because the mean of its divisors is an integer number (12042000).

Almost surely, 2^427073640 is an apocalyptic number.

427073640 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 427073640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (770688000).

427073640 is an abundant number, since it is smaller than the sum of its proper divisors (1114302360).

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

427073640 is a wasteful number, since it uses less digits than its factorization.

427073640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26799 (or 26795 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 427073640 is about 20665.7600876426. The cubic root of 427073640 is about 753.0681073969.

The spelling of 427073640 in words is "four hundred twenty-seven million, seventy-three thousand, six hundred forty".