290928644 has 12 divisors (see below), whose sum is σ = 509365584. Its totient is φ = 145395624.

The previous prime is 290928643. The next prime is 290928683. The reversal of 290928644 is 446829092.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 290928595 and 290928604.

It is not an unprimeable number, because it can be changed into a prime (290928643) 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, 6974 + ... + 25109.

It is an arithmetic number, because the mean of its divisors is an integer number (42447132).

Almost surely, 2^290928644 is an apocalyptic number.

It is an amenable number.

290928644 is a deficient number, since it is larger than the sum of its proper divisors (218436940).

290928644 is a wasteful number, since it uses less digits than its factorization.

290928644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34354 (or 34352 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 290928644 is about 17056.6304996034. The cubic root of 290928644 is about 662.6163699224.

The spelling of 290928644 in words is "two hundred ninety million, nine hundred twenty-eight thousand, six hundred forty-four".