638887354 has 16 divisors (see below), whose sum is σ = 1108433088. Its totient is φ = 270509472.

The previous prime is 638887349. The next prime is 638887357. The reversal of 638887354 is 453788836.

It is a super-2 number, since 2×638887354² = 816354102202242632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (638887357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273747 + ... + 276070.

It is an arithmetic number, because the mean of its divisors is an integer number (69277068).

Almost surely, 2^638887354 is an apocalyptic number.

638887354 is a deficient number, since it is larger than the sum of its proper divisors (469545734).

638887354 is a wasteful number, since it uses less digits than its factorization.

638887354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549909.

The product of its digits is 3870720, while the sum is 52.

The square root of 638887354 is about 25276.2211178807. The cubic root of 638887354 is about 861.2741856745.

The spelling of 638887354 in words is "six hundred thirty-eight million, eight hundred eighty-seven thousand, three hundred fifty-four".