747949680 has 160 divisors (see below), whose sum is σ = 2727950400. Its totient is φ = 187711488.

The previous prime is 747949669. The next prime is 747949693. The reversal of 747949680 is 86949747.

It is a happy number.

747949680 is a `hidden beast` number, since 7 + 4 + 79 + 496 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26536 + ... + 46904.

It is an arithmetic number, because the mean of its divisors is an integer number (17049690).

Almost surely, 2^747949680 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 747949680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363975200).

747949680 is an abundant number, since it is smaller than the sum of its proper divisors (1980000720).

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

747949680 is a wasteful number, since it uses less digits than its factorization.

747949680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20408 (or 20396 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The square root of 747949680 is about 27348.6687061729. The cubic root of 747949680 is about 907.7316122168.

The spelling of 747949680 in words is "seven hundred forty-seven million, nine hundred forty-nine thousand, six hundred eighty".