77139250 has 32 divisors (see below), whose sum is σ = 145939248. Its totient is φ = 30528000.

The previous prime is 77139241. The next prime is 77139269. The reversal of 77139250 is 5293177.

It can be written as a sum of positive squares in 8 ways, for example, as 769129 + 76370121 = 877^2 + 8739^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22660 + ... + 25840.

Almost surely, 2^77139250 is an apocalyptic number.

77139250 is a deficient number, since it is larger than the sum of its proper divisors (68799998).

77139250 is a wasteful number, since it uses less digits than its factorization.

77139250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3295 (or 3285 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 77139250 is about 8782.8953084959. The cubic root of 77139250 is about 425.6883884264.

The spelling of 77139250 in words is "seventy-seven million, one hundred thirty-nine thousand, two hundred fifty".