747770240 has 128 divisors (see below), whose sum is σ = 2068657920. Its totient is φ = 253163520.

The previous prime is 747770239. The next prime is 747770263. The reversal of 747770240 is 42077747.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 747770194 and 747770203.

It is a congruent number.

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, 370835 + ... + 372845.

It is an arithmetic number, because the mean of its divisors is an integer number (16161390).

Almost surely, 2^747770240 is an apocalyptic number.

747770240 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 747770240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034328960).

747770240 is an abundant number, since it is smaller than the sum of its proper divisors (1320887680).

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

747770240 is a wasteful number, since it uses less digits than its factorization.

747770240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120 (or 2108 counting only the distinct ones).

The product of its (nonzero) digits is 76832, while the sum is 38.

The square root of 747770240 is about 27345.3879109440. The cubic root of 747770240 is about 907.6590153598.

The spelling of 747770240 in words is "seven hundred forty-seven million, seven hundred seventy thousand, two hundred forty".