908423638 has 4 divisors (see below), whose sum is σ = 1362635460. Its totient is φ = 454211818.

The previous prime is 908423627. The next prime is 908423639. The reversal of 908423638 is 836324809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836324809 = 17 ⋅49195577.

It is a junction number, because it is equal to n+sod(n) for n = 908423594 and 908423603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (908423639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227105908 + ... + 227105911.

It is an arithmetic number, because the mean of its divisors is an integer number (340658865).

Almost surely, 2^908423638 is an apocalyptic number.

908423638 is a deficient number, since it is larger than the sum of its proper divisors (454211822).

908423638 is a wasteful number, since it uses less digits than its factorization.

908423638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454211821.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 908423638 is about 30140.0669873177. The cubic root of 908423638 is about 968.4922329492.

The spelling of 908423638 in words is "nine hundred eight million, four hundred twenty-three thousand, six hundred thirty-eight".