42638132 has 12 divisors (see below), whose sum is σ = 75639396. Its totient is φ = 21026880.

The previous prime is 42638081. The next prime is 42638143. The reversal of 42638132 is 23183624.

It can be written as a sum of positive squares in 2 ways, for example, as 9759376 + 32878756 = 3124^2 + 5734^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42638095 and 42638104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72719 + ... + 73302.

It is an arithmetic number, because the mean of its divisors is an integer number (6303283).

Almost surely, 2^42638132 is an apocalyptic number.

It is an amenable number.

42638132 is a deficient number, since it is larger than the sum of its proper divisors (33001264).

42638132 is a wasteful number, since it uses less digits than its factorization.

42638132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146098 (or 146096 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 42638132 is about 6529.7880516905. The cubic root of 42638132 is about 349.3542706245.

The spelling of 42638132 in words is "forty-two million, six hundred thirty-eight thousand, one hundred thirty-two".