638030226 has 16 divisors (see below), whose sum is σ = 1277310528. Its totient is φ = 212468400.

The previous prime is 638030221. The next prime is 638030243. The reversal of 638030226 is 622030836.

It is a super-2 number, since 2×638030226² = 814165138579222152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 638030193 and 638030202.

It is not an unprimeable number, because it can be changed into a prime (638030221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45385 + ... + 57756.

It is an arithmetic number, because the mean of its divisors is an integer number (79831908).

Almost surely, 2^638030226 is an apocalyptic number.

638030226 is an abundant number, since it is smaller than the sum of its proper divisors (639280302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638030226 is a wasteful number, since it uses less digits than its factorization.

638030226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104177.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 638030226 is about 25259.2602029434. The cubic root of 638030226 is about 860.8888529584. Note that the first 4 decimals are identical.

The spelling of 638030226 in words is "six hundred thirty-eight million, thirty thousand, two hundred twenty-six".