30102290 has 16 divisors (see below), whose sum is σ = 56053080. Its totient is φ = 11625600.

The previous prime is 30102277. The next prime is 30102299. The reversal of 30102290 is 9220103.

It can be written as a sum of positive squares in 4 ways, for example, as 24631369 + 5470921 = 4963^2 + 2339^2 .

It is a super-2 number, since 2×30102290² = 1812295726488200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30102299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51611 + ... + 52190.

Almost surely, 2^30102290 is an apocalyptic number.

30102290 is a deficient number, since it is larger than the sum of its proper divisors (25950790).

30102290 is a wasteful number, since it uses less digits than its factorization.

30102290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103837.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 30102290 is about 5486.5553856678. Note that the first 3 decimals coincide. The cubic root of 30102290 is about 311.0760042113.

Adding to 30102290 its reverse (9220103), we get a palindrome (39322393).

The spelling of 30102290 in words is "thirty million, one hundred two thousand, two hundred ninety".