654842394 has 40 divisors (see below), whose sum is σ = 1476393600. Its totient is φ = 216932904.

The previous prime is 654842393. The next prime is 654842413. The reversal of 654842394 is 493248456.

654842394 is a `hidden beast` number, since 65 + 484 + 23 + 94 = 666.

It is not an unprimeable number, because it can be changed into a prime (654842393) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 14007 + ... + 38805.

It is an arithmetic number, because the mean of its divisors is an integer number (36909840).

Almost surely, 2^654842394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654842394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738196800).

654842394 is an abundant number, since it is smaller than the sum of its proper divisors (821551206).

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

654842394 is a wasteful number, since it uses less digits than its factorization.

654842394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24976 (or 24967 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 654842394 is about 25589.8885108943. Note that the first 3 decimals coincide. The cubic root of 654842394 is about 868.3848988829.

The spelling of 654842394 in words is "six hundred fifty-four million, eight hundred forty-two thousand, three hundred ninety-four".