609427840 has 64 divisors (see below), whose sum is σ = 1665056160. Its totient is φ = 208945152.

The previous prime is 609427811. The next prime is 609427843. The reversal of 609427840 is 48724906.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 609427793 and 609427802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609427843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63537 + ... + 72496.

Almost surely, 2^609427840 is an apocalyptic number.

It is an amenable number.

609427840 is an abundant number, since it is smaller than the sum of its proper divisors (1055628320).

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

609427840 is a wasteful number, since it uses less digits than its factorization.

609427840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136059 (or 136047 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 609427840 is about 24686.5923124274. The cubic root of 609427840 is about 847.8273648812.

The spelling of 609427840 in words is "six hundred nine million, four hundred twenty-seven thousand, eight hundred forty".