427429644 has 12 divisors (see below), whose sum is σ = 997335864. Its totient is φ = 142476544.

The previous prime is 427429621. The next prime is 427429679. The reversal of 427429644 is 446924724.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×427429644² = 365392201139933472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 427429596 and 427429605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17809557 + ... + 17809580.

It is an arithmetic number, because the mean of its divisors is an integer number (83111322).

Almost surely, 2^427429644 is an apocalyptic number.

It is an amenable number.

427429644 is an abundant number, since it is smaller than the sum of its proper divisors (569906220).

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

427429644 is a wasteful number, since it uses less digits than its factorization.

427429644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35619144 (or 35619142 counting only the distinct ones).

The product of its digits is 387072, while the sum is 42.

The square root of 427429644 is about 20674.3716712262. The cubic root of 427429644 is about 753.2772991101.

The spelling of 427429644 in words is "four hundred twenty-seven million, four hundred twenty-nine thousand, six hundred forty-four".