77388345 has 16 divisors (see below), whose sum is σ = 137579520. Its totient is φ = 41273712.

The previous prime is 77388313. The next prime is 77388371. The reversal of 77388345 is 54388377.

It is not a de Polignac number, because 77388345 - 2⁵ = 77388313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77388345.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286489 + ... + 286758.

It is an arithmetic number, because the mean of its divisors is an integer number (8598720).

Almost surely, 2^77388345 is an apocalyptic number.

It is an amenable number.

77388345 is a deficient number, since it is larger than the sum of its proper divisors (60191175).

77388345 is a wasteful number, since it uses less digits than its factorization.

77388345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573261 (or 573255 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 77388345 is about 8797.0645672292. The cubic root of 77388345 is about 426.1461014444.

The spelling of 77388345 in words is "seventy-seven million, three hundred eighty-eight thousand, three hundred forty-five".