64020442 has 4 divisors (see below), whose sum is σ = 96030666. Its totient is φ = 32010220.

The previous prime is 64020427. The next prime is 64020457. The reversal of 64020442 is 24402046.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (64020427) and next prime (64020457).

It can be written as a sum of positive squares in only one way, i.e., 60855601 + 3164841 = 7801^2 + 1779^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16005109 + ... + 16005112.

Almost surely, 2^64020442 is an apocalyptic number.

64020442 is a deficient number, since it is larger than the sum of its proper divisors (32010224).

64020442 is a wasteful number, since it uses less digits than its factorization.

64020442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32010223.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 64020442 is about 8001.2775229959. The cubic root of 64020442 is about 400.0425829666.

Adding to 64020442 its reverse (24402046), we get a palindrome (88422488).

It can be divided in two parts, 6402044 and 2, that added together give a palindrome (6402046).

The spelling of 64020442 in words is "sixty-four million, twenty thousand, four hundred forty-two".