785274640 has 80 divisors (see below), whose sum is σ = 1930876416. Its totient is φ = 296524800.

The previous prime is 785274631. The next prime is 785274667. The reversal of 785274640 is 46472587.

785274640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 97819 + ... + 105541.

Almost surely, 2^785274640 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 785274640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (965438208).

785274640 is an abundant number, since it is smaller than the sum of its proper divisors (1145601776).

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

785274640 is a wasteful number, since it uses less digits than its factorization.

785274640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7808 (or 7802 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 43.

The square root of 785274640 is about 28022.7521846088. The cubic root of 785274640 is about 922.5867026809.

The spelling of 785274640 in words is "seven hundred eighty-five million, two hundred seventy-four thousand, six hundred forty".