420401504738 has 4 divisors (see below), whose sum is σ = 630602257110. Its totient is φ = 210200752368.

The previous prime is 420401504737. The next prime is 420401504773. The reversal of 420401504738 is 837405104024.

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., 254567675209 + 165833829529 = 504547^2 + 407227^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420401504737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105100376183 + ... + 105100376186.

Almost surely, 2^420401504738 is an apocalyptic number.

420401504738 is a deficient number, since it is larger than the sum of its proper divisors (210200752372).

420401504738 is a wasteful number, since it uses less digits than its factorization.

420401504738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210200752371.

The product of its (nonzero) digits is 107520, while the sum is 38.

The spelling of 420401504738 in words is "four hundred twenty billion, four hundred one million, five hundred four thousand, seven hundred thirty-eight".