290001620 has 12 divisors (see below), whose sum is σ = 609003444. Its totient is φ = 116000640.

The previous prime is 290001619. The next prime is 290001629. The reversal of 290001620 is 26100092.

It can be written as a sum of positive squares in 2 ways, for example, as 142038724 + 147962896 = 11918^2 + 12164^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 14500081 = 290001620 / (2 + 9 + 0 + 0 + 0 + 1 + 6 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 290001592 and 290001601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290001629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7250021 + ... + 7250060.

It is an arithmetic number, because the mean of its divisors is an integer number (50750287).

Almost surely, 2^290001620 is an apocalyptic number.

290001620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290001620 is an abundant number, since it is smaller than the sum of its proper divisors (319001824).

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

290001620 is a wasteful number, since it uses less digits than its factorization.

290001620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14500090 (or 14500088 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 290001620 is about 17029.4339306978. The cubic root of 290001620 is about 661.9118273235.

The spelling of 290001620 in words is "two hundred ninety million, one thousand, six hundred twenty".