7725423420 has 288 divisors, whose sum is σ = 28002723840. Its totient is φ = 1699130880.

The previous prime is 7725423403. The next prime is 7725423421. The reversal of 7725423420 is 243245277.

It is a happy number.

7725423420 is a `hidden beast` number, since 7 + 72 + 542 + 3 + 42 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7725423421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1516117 + ... + 1521203.

It is an arithmetic number, because the mean of its divisors is an integer number (97231680).

Almost surely, 2^7725423420 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 7725423420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14001361920).

7725423420 is an abundant number, since it is smaller than the sum of its proper divisors (20277300420).

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

7725423420 is a wasteful number, since it uses less digits than its factorization.

7725423420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5185 (or 5180 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 36.

The square root of 7725423420 is about 87894.3878754497. The cubic root of 7725423420 is about 1976.8517308018.

Adding to 7725423420 its reverse (243245277), we get a palindrome (7968668697).

The spelling of 7725423420 in words is "seven billion, seven hundred twenty-five million, four hundred twenty-three thousand, four hundred twenty".