55828639 has 2 divisors, whose sum is σ = 55828640. Its totient is φ = 55828638.

The previous prime is 55828609. The next prime is 55828651. The reversal of 55828639 is 93682855.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55828639 - 2⁹ = 55828127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55828609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27914319 + 27914320.

It is an arithmetic number, because the mean of its divisors is an integer number (27914320).

Almost surely, 2^55828639 is an apocalyptic number.

55828639 is a deficient number, since it is larger than the sum of its proper divisors (1).

55828639 is an equidigital number, since it uses as much as digits as its factorization.

55828639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 46.

The square root of 55828639 is about 7471.8564627541. The cubic root of 55828639 is about 382.1955975905.

The spelling of 55828639 in words is "fifty-five million, eight hundred twenty-eight thousand, six hundred thirty-nine".