774248139 has 40 divisors (see below), whose sum is σ = 1324436960. Its totient is φ = 441552384.

The previous prime is 774248131. The next prime is 774248143. The reversal of 774248139 is 931842477.

774248139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 774248139 - 2³ = 774248131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 774248094 and 774248103.

It is not an unprimeable number, because it can be changed into a prime (774248131) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 380577 + ... + 382605.

It is an arithmetic number, because the mean of its divisors is an integer number (33110924).

Almost surely, 2^774248139 is an apocalyptic number.

774248139 is a deficient number, since it is larger than the sum of its proper divisors (550188821).

774248139 is a wasteful number, since it uses less digits than its factorization.

774248139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721 (or 2712 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 774248139 is about 27825.3147152013. The cubic root of 774248139 is about 918.2481387394.

The spelling of 774248139 in words is "seven hundred seventy-four million, two hundred forty-eight thousand, one hundred thirty-nine".