427621805 has 32 divisors (see below), whose sum is σ = 565488000. Its totient is φ = 308512512.

The previous prime is 427621751. The next prime is 427621807. The reversal of 427621805 is 508126724.

It is a cyclic number.

It is not a de Polignac number, because 427621805 - 2⁶ = 427621741 is a prime.

It is a super-3 number, since 3×427621805³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427621807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 648566 + ... + 649224.

It is an arithmetic number, because the mean of its divisors is an integer number (17671500).

Almost surely, 2^427621805 is an apocalyptic number.

It is an amenable number.

427621805 is a deficient number, since it is larger than the sum of its proper divisors (137866195).

427621805 is a wasteful number, since it uses less digits than its factorization.

427621805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 427621805 is about 20679.0184728386. The cubic root of 427621805 is about 753.3901666775.

The spelling of 427621805 in words is "four hundred twenty-seven million, six hundred twenty-one thousand, eight hundred five".