618037398 has 64 divisors (see below), whose sum is σ = 1508544000. Its totient is φ = 186000480.

The previous prime is 618037391. The next prime is 618037411. The reversal of 618037398 is 893730816.

It is a happy number.

It is a super-2 number, since 2×618037398² = 763940450653220808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618037391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85015 + ... + 91997.

It is an arithmetic number, because the mean of its divisors is an integer number (23571000).

Almost surely, 2^618037398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618037398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754272000).

618037398 is an abundant number, since it is smaller than the sum of its proper divisors (890506602).

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

618037398 is a wasteful number, since it uses less digits than its factorization.

618037398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7154 (or 7148 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 618037398 is about 24860.3579620246. The cubic root of 618037398 is about 851.8012083322.

The spelling of 618037398 in words is "six hundred eighteen million, thirty-seven thousand, three hundred ninety-eight".