7772427840 has 112 divisors (see below), whose sum is σ = 24712208640. Its totient is φ = 2069729280.

The previous prime is 7772427823. The next prime is 7772427841. The reversal of 7772427840 is 487242777.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 7772427840.

It is not an unprimeable number, because it can be changed into a prime (7772427841) 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, 725241 + ... + 735879.

It is an arithmetic number, because the mean of its divisors is an integer number (220644720).

Almost surely, 2^7772427840 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 7772427840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12356104320).

7772427840 is an abundant number, since it is smaller than the sum of its proper divisors (16939780800).

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

7772427840 is a wasteful number, since it uses less digits than its factorization.

7772427840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11420 (or 11410 counting only the distinct ones).

The product of its (nonzero) digits is 1229312, while the sum is 48.

The square root of 7772427840 is about 88161.3738549939. The cubic root of 7772427840 is about 1980.8529332091.

The spelling of 7772427840 in words is "seven billion, seven hundred seventy-two million, four hundred twenty-seven thousand, eight hundred forty".