8642290 has 32 divisors (see below), whose sum is σ = 17048880. Its totient is φ = 3139584.

The previous prime is 8642281. The next prime is 8642303. The reversal of 8642290 is 922468.

It can be written as a sum of positive squares in 8 ways, for example, as 2486929 + 6155361 = 1577^2 + 2481^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4054 + ... + 5806.

Almost surely, 2^8642290 is an apocalyptic number.

8642290 is a deficient number, since it is larger than the sum of its proper divisors (8406590).

8642290 is a wasteful number, since it uses less digits than its factorization.

8642290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 8642290 is about 2939.7772024424. Note that the first 3 decimals coincide. The cubic root of 8642290 is about 205.2152409114.

The spelling of 8642290 in words is "eight million, six hundred forty-two thousand, two hundred ninety".