427388621 has 8 divisors (see below), whose sum is σ = 466442688. Its totient is φ = 388368000.

The previous prime is 427388617. The next prime is 427388627. The reversal of 427388621 is 126883724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 427388621 - 2² = 427388617 is a prime.

It is a super-2 number, since 2×427388621² = 365322066720563282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427388627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23741 + ... + 37661.

It is an arithmetic number, because the mean of its divisors is an integer number (58305336).

Almost surely, 2^427388621 is an apocalyptic number.

It is an amenable number.

427388621 is a deficient number, since it is larger than the sum of its proper divisors (39054067).

427388621 is a wasteful number, since it uses less digits than its factorization.

427388621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16723.

The product of its digits is 129024, while the sum is 41.

The square root of 427388621 is about 20673.3795253703. The cubic root of 427388621 is about 753.2531994844.

The spelling of 427388621 in words is "four hundred twenty-seven million, three hundred eighty-eight thousand, six hundred twenty-one".