609373440 has 324 divisors, whose sum is σ = 2290320396. Its totient is φ = 149520384.

The previous prime is 609373439. The next prime is 609373451. The reversal of 609373440 is 44373906.

609373440 is a `hidden beast` number, since 60 + 93 + 73 + 440 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 322274304 + 287099136 = 17952^2 + 16944^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 609373395 and 609373404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1946724 + ... + 1947036.

Almost surely, 2^609373440 is an apocalyptic number.

609373440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609373440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1145160198).

609373440 is an abundant number, since it is smaller than the sum of its proper divisors (1680946956).

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

609373440 is a wasteful number, since it uses less digits than its factorization.

609373440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 609373440 is about 24685.4904751759. The cubic root of 609373440 is about 847.8021372945.

The spelling of 609373440 in words is "six hundred nine million, three hundred seventy-three thousand, four hundred forty".