387426290 has 16 divisors (see below), whose sum is σ = 710526168. Its totient is φ = 152046336.

The previous prime is 387426289. The next prime is 387426293. The reversal of 387426290 is 92624783.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 362635849 + 24790441 = 19043^2 + 4979^2 .

It is not an unprimeable number, because it can be changed into a prime (387426293) 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, 364967 + ... + 366026.

Almost surely, 2^387426290 is an apocalyptic number.

387426290 is a deficient number, since it is larger than the sum of its proper divisors (323099878).

387426290 is a wasteful number, since it uses less digits than its factorization.

387426290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731053.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 387426290 is about 19683.1473601149. The cubic root of 387426290 is about 729.0036385168.

The spelling of 387426290 in words is "three hundred eighty-seven million, four hundred twenty-six thousand, two hundred ninety".