556267638 has 8 divisors (see below), whose sum is σ = 1112535288. Its totient is φ = 185422544.

The previous prime is 556267633. The next prime is 556267643. The reversal of 556267638 is 836762655.

It is an interprime number because it is at equal distance from previous prime (556267633) and next prime (556267643).

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

556267638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556267631) 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, 46355631 + ... + 46355642.

It is an arithmetic number, because the mean of its divisors is an integer number (139066911).

Almost surely, 2^556267638 is an apocalyptic number.

556267638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

556267638 is a wasteful number, since it uses less digits than its factorization.

556267638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92711278.

The product of its digits is 1814400, while the sum is 48.

The square root of 556267638 is about 23585.3267520295. The cubic root of 556267638 is about 822.4217707522.

The spelling of 556267638 in words is "five hundred fifty-six million, two hundred sixty-seven thousand, six hundred thirty-eight".