290161616 has 40 divisors (see below), whose sum is σ = 596182080. Its totient is φ = 136422144.

The previous prime is 290161601. The next prime is 290161621. The reversal of 290161616 is 616161092.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38165 + ... + 45131.

It is an arithmetic number, because the mean of its divisors is an integer number (14904552).

Almost surely, 2^290161616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290161616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298091040).

290161616 is an abundant number, since it is smaller than the sum of its proper divisors (306020464).

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

290161616 is a wasteful number, since it uses less digits than its factorization.

290161616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131 (or 7125 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 290161616 is about 17034.1309141382. The cubic root of 290161616 is about 662.0335321319.

The spelling of 290161616 in words is "two hundred ninety million, one hundred sixty-one thousand, six hundred sixteen".