1623455434 has 8 divisors (see below), whose sum is σ = 2494577988. Its totient is φ = 791929440.

The previous prime is 1623455429. The next prime is 1623455447. The reversal of 1623455434 is 4345543261.

It can be written as a sum of positive squares in 2 ways, for example, as 1254930625 + 368524809 = 35425^2 + 19197^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1623455393 and 1623455402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9899037 + ... + 9899200.

Almost surely, 2^1623455434 is an apocalyptic number.

1623455434 is a deficient number, since it is larger than the sum of its proper divisors (871122554).

1623455434 is a wasteful number, since it uses less digits than its factorization.

1623455434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19798280.

The product of its digits is 172800, while the sum is 37.

The square root of 1623455434 is about 40292.1262035152. The cubic root of 1623455434 is about 1175.2947343325.

Adding to 1623455434 its reverse (4345543261), we get a palindrome (5968998695).

The spelling of 1623455434 in words is "one billion, six hundred twenty-three million, four hundred fifty-five thousand, four hundred thirty-four".