7779840432 has 80 divisors (see below), whose sum is σ = 24735916800. Its totient is φ = 2051824896.

The previous prime is 7779840389. The next prime is 7779840433. The reversal of 7779840432 is 2340489777.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7779840433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 886182 + ... + 894917.

It is an arithmetic number, because the mean of its divisors is an integer number (309198960).

Almost surely, 2^7779840432 is an apocalyptic number.

It is an amenable number.

7779840432 is an abundant number, since it is smaller than the sum of its proper divisors (16956076368).

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

7779840432 is a wasteful number, since it uses less digits than its factorization.

7779840432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781130 (or 1781124 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 51.

The square root of 7779840432 is about 88203.4037438465. The cubic root of 7779840432 is about 1981.4824486173.

The spelling of 7779840432 in words is "seven billion, seven hundred seventy-nine million, eight hundred forty thousand, four hundred thirty-two".