290528730 has 24 divisors (see below), whose sum is σ = 755374932. Its totient is φ = 77474304.

The previous prime is 290528729. The next prime is 290528737. The reversal of 290528730 is 37825092.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 290259369 + 269361 = 17037^2 + 519^2 .

It is not an unprimeable number, because it can be changed into a prime (290528737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1613959 + ... + 1614138.

Almost surely, 2^290528730 is an apocalyptic number.

290528730 is an abundant number, since it is smaller than the sum of its proper divisors (464846202).

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

290528730 is a wasteful number, since it uses less digits than its factorization.

290528730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3228110 (or 3228107 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 290528730 is about 17044.9033438151. The cubic root of 290528730 is about 662.3126172319.

The spelling of 290528730 in words is "two hundred ninety million, five hundred twenty-eight thousand, seven hundred thirty".