608181990 has 96 divisors (see below), whose sum is σ = 1593768960. Its totient is φ = 148457088.

The previous prime is 608181979. The next prime is 608181991. The reversal of 608181990 is 99181806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (608181991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 704299 + ... + 705161.

It is an arithmetic number, because the mean of its divisors is an integer number (16601760).

Almost surely, 2^608181990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 608181990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796884480).

608181990 is an abundant number, since it is smaller than the sum of its proper divisors (985586970).

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

608181990 is a wasteful number, since it uses less digits than its factorization.

608181990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038 (or 1025 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 608181990 is about 24661.3460703182. The cubic root of 608181990 is about 847.2492344642.

The spelling of 608181990 in words is "six hundred eight million, one hundred eighty-one thousand, nine hundred ninety".