654439506 has 16 divisors (see below), whose sum is σ = 1495861824. Its totient is φ = 186982704.

The previous prime is 654439483. The next prime is 654439519. The reversal of 654439506 is 605934456.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 15581893 = 654439506 / (6 + 5 + 4 + 4 + 3 + 9 + 5 + 0 + 6).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7790905 + ... + 7790988.

It is an arithmetic number, because the mean of its divisors is an integer number (93491364).

Almost surely, 2^654439506 is an apocalyptic number.

654439506 is an abundant number, since it is smaller than the sum of its proper divisors (841422318).

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

654439506 is a wasteful number, since it uses less digits than its factorization.

654439506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15581905.

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 654439506 is about 25582.0152841796. The cubic root of 654439506 is about 868.2067727500.

The spelling of 654439506 in words is "six hundred fifty-four million, four hundred thirty-nine thousand, five hundred six".