387691426 has 16 divisors (see below), whose sum is σ = 616416696. Its totient is φ = 182244096.

The previous prime is 387691373. The next prime is 387691441. The reversal of 387691426 is 624196783.

It can be written as a sum of positive squares in 4 ways, for example, as 379275625 + 8415801 = 19475^2 + 2901^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28180 + ... + 39616.

Almost surely, 2^387691426 is an apocalyptic number.

387691426 is a deficient number, since it is larger than the sum of its proper divisors (228725270).

387691426 is a wasteful number, since it uses less digits than its factorization.

387691426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12453.

The product of its digits is 435456, while the sum is 46.

The square root of 387691426 is about 19689.8813099521. The cubic root of 387691426 is about 729.1698989890.

The spelling of 387691426 in words is "three hundred eighty-seven million, six hundred ninety-one thousand, four hundred twenty-six".