32400400442 has 4 divisors (see below), whose sum is σ = 48600600666. Its totient is φ = 16200200220.

The previous prime is 32400400441. The next prime is 32400400531. The reversal of 32400400442 is 24400400423.

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

It can be written as a sum of positive squares in only one way, i.e., 18986359681 + 13414040761 = 137791^2 + 115819^2 .

It is not an unprimeable number, because it can be changed into a prime (32400400441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8100100109 + ... + 8100100112.

Almost surely, 2^32400400442 is an apocalyptic number.

32400400442 is a deficient number, since it is larger than the sum of its proper divisors (16200200224).

32400400442 is a wasteful number, since it uses less digits than its factorization.

32400400442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16200200223.

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 32400400442 its reverse (24400400423), we get a palindrome (56800800865).

The spelling of 32400400442 in words is "thirty-two billion, four hundred million, four hundred thousand, four hundred forty-two".