420242644 has 12 divisors (see below), whose sum is σ = 735587104. Its totient is φ = 210074904.

The previous prime is 420242623. The next prime is 420242653. The reversal of 420242644 is 446242024.

It is a super-2 number, since 2×420242644² = 353207759672221472, which contains 22 as substring.

It is a congruent number.

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, 16129 + ... + 33175.

Almost surely, 2^420242644 is an apocalyptic number.

It is an amenable number.

420242644 is a deficient number, since it is larger than the sum of its proper divisors (315344460).

420242644 is a wasteful number, since it uses less digits than its factorization.

420242644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23214 (or 23212 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

The square root of 420242644 is about 20499.8205845807. The cubic root of 420242644 is about 749.0314276211.

Adding to 420242644 its reverse (446242024), we get a palindrome (866484668).

The spelling of 420242644 in words is "four hundred twenty million, two hundred forty-two thousand, six hundred forty-four".