748638720 has 160 divisors (see below), whose sum is σ = 2659472640. Its totient is φ = 199618560.

The previous prime is 748638713. The next prime is 748638739. The reversal of 748638720 is 27836847.

It is a happy number.

748638720 is a `hidden beast` number, since 7 + 4 + 8 + 638 + 7 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 63705 + ... + 74535.

It is an arithmetic number, because the mean of its divisors is an integer number (16621704).

Almost surely, 2^748638720 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 748638720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1329736320).

748638720 is an abundant number, since it is smaller than the sum of its proper divisors (1910833920).

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

748638720 is a wasteful number, since it uses less digits than its factorization.

748638720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10863 (or 10841 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 748638720 is about 27361.2631287373. The cubic root of 748638720 is about 908.0102724164.

The spelling of 748638720 in words is "seven hundred forty-eight million, six hundred thirty-eight thousand, seven hundred twenty".