1238077686 has 16 divisors (see below), whose sum is σ = 2561540400. Its totient is φ = 398461728.

The previous prime is 1238077679. The next prime is 1238077727. The reversal of 1238077686 is 6867708321.

1238077686 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1238077686² = 3065672713142229192, which contains 22 as substring.

It is a congruent number.

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, 3557521 + ... + 3557868.

It is an arithmetic number, because the mean of its divisors is an integer number (160096275).

Almost surely, 2^1238077686 is an apocalyptic number.

1238077686 is an abundant number, since it is smaller than the sum of its proper divisors (1323462714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1238077686 is a wasteful number, since it uses less digits than its factorization.

1238077686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7115423.

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 1238077686 is about 35186.3281119244. The cubic root of 1238077686 is about 1073.7816190230.

The spelling of 1238077686 in words is "one billion, two hundred thirty-eight million, seventy-seven thousand, six hundred eighty-six".