7890420544 has 56 divisors (see below), whose sum is σ = 15839277440. Its totient is φ = 3899695104.

The previous prime is 7890420523. The next prime is 7890420547. The reversal of 7890420544 is 4450240987.

It is a super-2 number, since 2×7890420544² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7890420544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7890420547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2011417 + ... + 2015335.

It is an arithmetic number, because the mean of its divisors is an integer number (282844240).

Almost surely, 2^7890420544 is an apocalyptic number.

It is an amenable number.

7890420544 is an abundant number, since it is smaller than the sum of its proper divisors (7948856896).

7890420544 is a wasteful number, since it uses less digits than its factorization.

7890420544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287 (or 4277 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 7890420544 is about 88828.0391768275. The cubic root of 7890420544 is about 1990.8263652134.

The spelling of 7890420544 in words is "seven billion, eight hundred ninety million, four hundred twenty thousand, five hundred forty-four".