4051988638 has 16 divisors (see below), whose sum is σ = 6123681936. Its totient is φ = 2010795840.

The previous prime is 4051988627. The next prime is 4051988657. The reversal of 4051988638 is 8368891504.

It is a super-2 number, since 2×4051988638² = 32837223844962190088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239920 + ... + 256252.

It is an arithmetic number, because the mean of its divisors is an integer number (382730121).

Almost surely, 2^4051988638 is an apocalyptic number.

4051988638 is a deficient number, since it is larger than the sum of its proper divisors (2071693298).

4051988638 is a wasteful number, since it uses less digits than its factorization.

4051988638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17259.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The square root of 4051988638 is about 63655.2326050263. The cubic root of 4051988638 is about 1594.2487053077.

The spelling of 4051988638 in words is "four billion, fifty-one million, nine hundred eighty-eight thousand, six hundred thirty-eight".