54786638 has 4 divisors (see below), whose sum is σ = 82179960. Its totient is φ = 27393318.

The previous prime is 54786617. The next prime is 54786643. The reversal of 54786638 is 83668745.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83668745 = 5 ⋅16733749.

It is a super-3 number, since 3×54786638³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 54786592 and 54786601.

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, 13696658 + ... + 13696661.

It is an arithmetic number, because the mean of its divisors is an integer number (20544990).

Almost surely, 2^54786638 is an apocalyptic number.

54786638 is a deficient number, since it is larger than the sum of its proper divisors (27393322).

54786638 is a wasteful number, since it uses less digits than its factorization.

54786638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27393321.

The product of its digits is 967680, while the sum is 47.

The square root of 54786638 is about 7401.7996460320. The cubic root of 54786638 is about 379.8028478695.

The spelling of 54786638 in words is "fifty-four million, seven hundred eighty-six thousand, six hundred thirty-eight".