427211664 has 80 divisors (see below), whose sum is σ = 1207047744. Its totient is φ = 129126400.

The previous prime is 427211663. The next prime is 427211689. The reversal of 427211664 is 466112724.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (427211663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274312 + ... + 275864.

Almost surely, 2^427211664 is an apocalyptic number.

427211664 is a gapful number since it is divisible by the number (44) 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 427211664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603523872).

427211664 is an abundant number, since it is smaller than the sum of its proper divisors (779836080).

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

427211664 is a wasteful number, since it uses less digits than its factorization.

427211664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096 (or 2090 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 427211664 is about 20669.0992546845. The cubic root of 427211664 is about 753.1492255518.

The spelling of 427211664 in words is "four hundred twenty-seven million, two hundred eleven thousand, six hundred sixty-four".