638260350 has 384 divisors, whose sum is σ = 2159861760. Its totient is φ = 120890880.

The previous prime is 638260313. The next prime is 638260351. The reversal of 638260350 is 53062836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638260351) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5964997 + ... + 5965103.

It is an arithmetic number, because the mean of its divisors is an integer number (5624640).

Almost surely, 2^638260350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 638260350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079930880).

638260350 is an abundant number, since it is smaller than the sum of its proper divisors (1521601410).

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

638260350 is a wasteful number, since it uses less digits than its factorization.

638260350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 638260350 is about 25263.8150325718. The cubic root of 638260350 is about 860.9923419807.

The spelling of 638260350 in words is "six hundred thirty-eight million, two hundred sixty thousand, three hundred fifty".