738721680 has 80 divisors (see below), whose sum is σ = 2310387840. Its totient is φ = 195241984.

The previous prime is 738721679. The next prime is 738721693. The reversal of 738721680 is 86127837.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13501 + ... + 40739.

It is an arithmetic number, because the mean of its divisors is an integer number (28879848).

Almost surely, 2^738721680 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 738721680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1155193920).

738721680 is an abundant number, since it is smaller than the sum of its proper divisors (1571666160).

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

738721680 is a wasteful number, since it uses less digits than its factorization.

738721680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27368 (or 27362 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 738721680 is about 27179.4348727121. The cubic root of 738721680 is about 903.9830380298.

The spelling of 738721680 in words is "seven hundred thirty-eight million, seven hundred twenty-one thousand, six hundred eighty".