451620434 has 8 divisors (see below), whose sum is σ = 679350780. Its totient is φ = 225170176.

The previous prime is 451620373. The next prime is 451620439. The reversal of 451620434 is 434026154.

It can be written as a sum of positive squares in 2 ways, for example, as 449652025 + 1968409 = 21205^2 + 1403^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×451620434² = 407922032812696712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 451620397 and 451620406.

It is not an unprimeable number, because it can be changed into a prime (451620439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319139 + ... + 320550.

Almost surely, 2^451620434 is an apocalyptic number.

451620434 is a deficient number, since it is larger than the sum of its proper divisors (227730346).

451620434 is a wasteful number, since it uses less digits than its factorization.

451620434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640044.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 451620434 is about 21251.3631092220. The cubic root of 451620434 is about 767.2281481933.

Adding to 451620434 its reverse (434026154), we get a palindrome (885646588).

The spelling of 451620434 in words is "four hundred fifty-one million, six hundred twenty thousand, four hundred thirty-four".