8138290 has 8 divisors (see below), whose sum is σ = 14648940. Its totient is φ = 3255312.

The previous prime is 8138279. The next prime is 8138323. The reversal of 8138290 is 928318.

It can be written as a sum of positive squares in 2 ways, for example, as 7403841 + 734449 = 2721^2 + 857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406905 + ... + 406924.

Almost surely, 2^8138290 is an apocalyptic number.

8138290 is a deficient number, since it is larger than the sum of its proper divisors (6510650).

8138290 is a wasteful number, since it uses less digits than its factorization.

8138290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813836.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 8138290 is about 2852.7688304523. The cubic root of 8138290 is about 201.1458393902.

The spelling of 8138290 in words is "eight million, one hundred thirty-eight thousand, two hundred ninety".