801550638 has 48 divisors (see below), whose sum is σ = 1987255296. Its totient is φ = 228730320.

The previous prime is 801550627. The next prime is 801550639. The reversal of 801550638 is 836055108.

801550638 is a `hidden beast` number, since 8 + 0 + 15 + 5 + 0 + 638 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801550639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111295 + ... + 118277.

It is an arithmetic number, because the mean of its divisors is an integer number (41401152).

Almost surely, 2^801550638 is an apocalyptic number.

801550638 is an abundant number, since it is smaller than the sum of its proper divisors (1185704658).

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

801550638 is a wasteful number, since it uses less digits than its factorization.

801550638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7909 (or 7906 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 801550638 is about 28311.6696434527. The cubic root of 801550638 is about 928.9171649540.

It can be divided in two parts, 8015 and 50638, that added together give a triangular number (58653 = T₃₄₂).

The spelling of 801550638 in words is "eight hundred one million, five hundred fifty thousand, six hundred thirty-eight".