618934385 has 32 divisors (see below), whose sum is σ = 817529760. Its totient is φ = 447741952.

The previous prime is 618934357. The next prime is 618934417. The reversal of 618934385 is 583439816.

It can be written as a sum of positive squares in 16 ways, for example, as 50922496 + 568011889 = 7136^2 + 23833^2 .

It is a cyclic number.

It is not a de Polignac number, because 618934385 - 2¹² = 618930289 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 633017 + ... + 633993.

It is an arithmetic number, because the mean of its divisors is an integer number (25547805).

Almost surely, 2^618934385 is an apocalyptic number.

It is an amenable number.

618934385 is a deficient number, since it is larger than the sum of its proper divisors (198595375).

618934385 is a wasteful number, since it uses less digits than its factorization.

618934385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285.

The product of its digits is 622080, while the sum is 47.

The square root of 618934385 is about 24878.3919295440. The cubic root of 618934385 is about 852.2130956357.

It can be divided in two parts, 6189 and 34385, that multiplied together give a triangular number (212808765 = T₂₀₆₃₀).

The spelling of 618934385 in words is "six hundred eighteen million, nine hundred thirty-four thousand, three hundred eighty-five".