290780745 has 16 divisors (see below), whose sum is σ = 465581760. Its totient is φ = 154972224.

The previous prime is 290780741. The next prime is 290780747. The reversal of 290780745 is 547087092.

It is not a de Polignac number, because 290780745 - 2² = 290780741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 290780697 and 290780706.

It is not an unprimeable number, because it can be changed into a prime (290780741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17547 + ... + 29823.

It is an arithmetic number, because the mean of its divisors is an integer number (29098860).

Almost surely, 2^290780745 is an apocalyptic number.

It is an amenable number.

290780745 is a deficient number, since it is larger than the sum of its proper divisors (174801015).

290780745 is a wasteful number, since it uses less digits than its factorization.

290780745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13864.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 290780745 is about 17052.2944203999. The cubic root of 290780745 is about 662.5040664281.

The spelling of 290780745 in words is "two hundred ninety million, seven hundred eighty thousand, seven hundred forty-five".