638037148 has 48 divisors (see below), whose sum is σ = 1296497664. Its totient is φ = 269104320.

The previous prime is 638037107. The next prime is 638037163. The reversal of 638037148 is 841730836.

It is a self number, because there is not a number n which added to its sum of digits gives 638037148.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517693 + ... + 518923.

It is an arithmetic number, because the mean of its divisors is an integer number (27010368).

Almost surely, 2^638037148 is an apocalyptic number.

It is an amenable number.

638037148 is an abundant number, since it is smaller than the sum of its proper divisors (658460516).

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

638037148 is a wasteful number, since it uses less digits than its factorization.

638037148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 638037148 is about 25259.3972216282. The cubic root of 638037148 is about 860.8919662127.

The spelling of 638037148 in words is "six hundred thirty-eight million, thirty-seven thousand, one hundred forty-eight".