639054 has 24 divisors (see below), whose sum is σ = 1491672. Its totient is φ = 196560.

The previous prime is 639053. The next prime is 639083. The reversal of 639054 is 450936.

It is a happy number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 639054.

It is not an unprimeable number, because it can be changed into a prime (639053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1132 + ... + 1599.

It is an arithmetic number, because the mean of its divisors is an integer number (62153).

2⁶³⁹⁰⁵⁴ is an apocalyptic number.

639054 is an abundant number, since it is smaller than the sum of its proper divisors (852618).

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

639054 is a wasteful number, since it uses less digits than its factorization.

639054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752 (or 2749 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 639054 is about 799.4085313530. The cubic root of 639054 is about 86.1349063465.

It can be divided in two parts, 6 and 39054, that added together give a triangular number (39060 = T₂₇₉).

The spelling of 639054 in words is "six hundred thirty-nine thousand, fifty-four".