638597098 has 8 divisors (see below), whose sum is σ = 960564960. Its totient is φ = 318408780.

The previous prime is 638597051. The next prime is 638597107. The reversal of 638597098 is 890795836.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443988 + ... + 445423.

It is an arithmetic number, because the mean of its divisors is an integer number (120070620).

Almost surely, 2^638597098 is an apocalyptic number.

638597098 is a deficient number, since it is larger than the sum of its proper divisors (321967862).

638597098 is a wasteful number, since it uses less digits than its factorization.

638597098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889772.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 638597098 is about 25270.4787845423. The cubic root of 638597098 is about 861.1437360388.

The spelling of 638597098 in words is "six hundred thirty-eight million, five hundred ninety-seven thousand, ninety-eight".