721074000 has 160 divisors (see below), whose sum is σ = 2375133696. Its totient is φ = 188121600.

The previous prime is 721073993. The next prime is 721074017. The reversal of 721074000 is 470127.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 280722 + ... + 283278.

Almost surely, 2^721074000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721074000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187566848).

721074000 is an abundant number, since it is smaller than the sum of its proper divisors (1654059696).

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

721074000 is a wasteful number, since it uses less digits than its factorization.

721074000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630 (or 2614 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 721074000 is about 26852.8210808474. The cubic root of 721074000 is about 896.7263787127.

The spelling of 721074000 in words is "seven hundred twenty-one million, seventy-four thousand".