7877728742 has 32 divisors (see below), whose sum is σ = 13441612800. Its totient is φ = 3436745760.

The previous prime is 7877728717. The next prime is 7877728811. The reversal of 7877728742 is 2478277787.

It is a happy number.

It is a super-2 number, since 2×7877728742² (a number of 21 digits) contains 22 as substring.

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, 78992 + ... + 148307.

It is an arithmetic number, because the mean of its divisors is an integer number (420050400).

Almost surely, 2^7877728742 is an apocalyptic number.

7877728742 is a deficient number, since it is larger than the sum of its proper divisors (5563884058).

7877728742 is a wasteful number, since it uses less digits than its factorization.

7877728742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227388.

The product of its digits is 17210368, while the sum is 59.

The square root of 7877728742 is about 88756.5701342723. The cubic root of 7877728742 is about 1989.7583725548.

The spelling of 7877728742 in words is "seven billion, eight hundred seventy-seven million, seven hundred twenty-eight thousand, seven hundred forty-two".