1638800674 has 8 divisors (see below), whose sum is σ = 2809372608. Its totient is φ = 702343140.

The previous prime is 1638800671. The next prime is 1638800689. The reversal of 1638800674 is 4760088361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1638800674.

It is not an unprimeable number, because it can be changed into a prime (1638800671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58528582 + ... + 58528609.

It is an arithmetic number, because the mean of its divisors is an integer number (351171576).

Almost surely, 2^1638800674 is an apocalyptic number.

1638800674 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1638800674 is a deficient number, since it is larger than the sum of its proper divisors (1170571934).

1638800674 is a wasteful number, since it uses less digits than its factorization.

1638800674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117057200.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 1638800674 is about 40482.1031321249. The cubic root of 1638800674 is about 1178.9861717085.

The spelling of 1638800674 in words is "one billion, six hundred thirty-eight million, eight hundred thousand, six hundred seventy-four".