872436434 has 4 divisors (see below), whose sum is σ = 1308654654. Its totient is φ = 436218216.

The previous prime is 872436407. The next prime is 872436443. The reversal of 872436434 is 434634278.

It is a happy number.

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., 866419225 + 6017209 = 29435^2 + 2453^2 .

It is a super-2 number, since 2×872436434² = 1522290662741272712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 872436391 and 872436400.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 218109107 + ... + 218109110.

Almost surely, 2^872436434 is an apocalyptic number.

872436434 is a deficient number, since it is larger than the sum of its proper divisors (436218220).

872436434 is a wasteful number, since it uses less digits than its factorization.

872436434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436218219.

The product of its digits is 387072, while the sum is 41.

The square root of 872436434 is about 29537.0349561360. The cubic root of 872436434 is about 955.5305966609.

The spelling of 872436434 in words is "eight hundred seventy-two million, four hundred thirty-six thousand, four hundred thirty-four".