638412 has 12 divisors (see below), whose sum is σ = 1489656. Its totient is φ = 212800.

The previous prime is 638371. The next prime is 638423. The reversal of 638412 is 214836.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam 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, 26589 + ... + 26612.

It is an arithmetic number, because the mean of its divisors is an integer number (124138).

2⁶³⁸⁴¹² is an apocalyptic number.

It is an amenable number.

638412 is an abundant number, since it is smaller than the sum of its proper divisors (851244).

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

638412 is a wasteful number, since it uses less digits than its factorization.

638412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53208 (or 53206 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 638412 is about 799.0068835749. The cubic root of 638412 is about 86.1060526878.

The spelling of 638412 in words is "six hundred thirty-eight thousand, four hundred twelve".