452638778 has 4 divisors (see below), whose sum is σ = 678958170. Its totient is φ = 226319388.

The previous prime is 452638777. The next prime is 452638817. The reversal of 452638778 is 877836254.

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., 284495689 + 168143089 = 16867^2 + 12967^2 .

It is not an unprimeable number, because it can be changed into a prime (452638777) by changing a digit.

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, 113159693 + ... + 113159696.

Almost surely, 2^452638778 is an apocalyptic number.

452638778 is a deficient number, since it is larger than the sum of its proper divisors (226319392).

452638778 is a wasteful number, since it uses less digits than its factorization.

452638778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226319391.

The product of its digits is 2257920, while the sum is 50.

The square root of 452638778 is about 21275.3091164382. The cubic root of 452638778 is about 767.8043811040.

The spelling of 452638778 in words is "four hundred fifty-two million, six hundred thirty-eight thousand, seven hundred seventy-eight".