729040620 has 144 divisors (see below), whose sum is σ = 2590576128. Its totient is φ = 151482240.

The previous prime is 729040589. The next prime is 729040633. The reversal of 729040620 is 26040927.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21069 + ... + 43611.

It is an arithmetic number, because the mean of its divisors is an integer number (17990112).

Almost surely, 2^729040620 is an apocalyptic number.

729040620 is a gapful number since it is divisible by the number (70) 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 729040620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1295288064).

729040620 is an abundant number, since it is smaller than the sum of its proper divisors (1861535508).

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

729040620 is a wasteful number, since it uses less digits than its factorization.

729040620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22580 (or 22571 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 729040620 is about 27000.7522117440. The cubic root of 729040620 is about 900.0167157389.

The spelling of 729040620 in words is "seven hundred twenty-nine million, forty thousand, six hundred twenty".