478720252394 has 4 divisors (see below), whose sum is σ = 718080378594. Its totient is φ = 239360126196.

The previous prime is 478720252349. The next prime is 478720252403. The reversal of 478720252394 is 493252027874.

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., 277321251769 + 201399000625 = 526613^2 + 448775^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119680063097 + ... + 119680063100.

Almost surely, 2^478720252394 is an apocalyptic number.

478720252394 is a deficient number, since it is larger than the sum of its proper divisors (239360126200).

478720252394 is a wasteful number, since it uses less digits than its factorization.

478720252394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239360126199.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 478720252394 in words is "four hundred seventy-eight billion, seven hundred twenty million, two hundred fifty-two thousand, three hundred ninety-four".