386978090 has 16 divisors (see below), whose sum is σ = 713550600. Its totient is φ = 151015680.

The previous prime is 386978071. The next prime is 386978099. The reversal of 386978090 is 90879683.

It can be written as a sum of positive squares in 4 ways, for example, as 108722329 + 278255761 = 10427^2 + 16681^2 .

It is not an unprimeable number, because it can be changed into a prime (386978099) 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, 471515 + ... + 472334.

Almost surely, 2^386978090 is an apocalyptic number.

386978090 is a deficient number, since it is larger than the sum of its proper divisors (326572510).

386978090 is a wasteful number, since it uses less digits than its factorization.

386978090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943897.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 386978090 is about 19671.7586910779. The cubic root of 386978090 is about 728.7224103898.

The spelling of 386978090 in words is "three hundred eighty-six million, nine hundred seventy-eight thousand, ninety".