272638 has 4 divisors (see below), whose sum is σ = 408960. Its totient is φ = 136318.

The previous prime is 272621. The next prime is 272651. The reversal of 272638 is 836272.

It is a semiprime because it is the product of two primes.

It is a super-4 number, since 4×272638⁴ (a number of 23 digits) contains 4444 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68158 + ... + 68161.

It is an arithmetic number, because the mean of its divisors is an integer number (102240).

2²⁷²⁶³⁸ is an apocalyptic number.

272638 is a deficient number, since it is larger than the sum of its proper divisors (136322).

272638 is a wasteful number, since it uses less digits than its factorization.

272638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136321.

The product of its digits is 4032, while the sum is 28.

The square root of 272638 is about 522.1474887424. The cubic root of 272638 is about 64.8428551045.

The spelling of 272638 in words is "two hundred seventy-two thousand, six hundred thirty-eight".