42639000 has 128 divisors (see below), whose sum is σ = 135794880. Its totient is φ = 11136000.

The previous prime is 42638993. The next prime is 42639041. The reversal of 42639000 is 93624.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 182884 + ... + 183116.

Almost surely, 2^42639000 is an apocalyptic number.

42639000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42639000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67897440).

42639000 is an abundant number, since it is smaller than the sum of its proper divisors (93155880).

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

42639000 is a wasteful number, since it uses less digits than its factorization.

42639000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 42639000 is about 6529.8545159904. The cubic root of 42639000 is about 349.3566412525.

The spelling of 42639000 in words is "forty-two million, six hundred thirty-nine thousand".