7442890644 has 24 divisors (see below), whose sum is σ = 19847708608. Its totient is φ = 2126540160.

The previous prime is 7442890619. The next prime is 7442890681. The reversal of 7442890644 is 4460982447.

It is a super-2 number, since 2×7442890644² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7442890593 and 7442890602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44302837 + ... + 44303004.

Almost surely, 2^7442890644 is an apocalyptic number.

It is an amenable number.

7442890644 is an abundant number, since it is smaller than the sum of its proper divisors (12404817964).

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

7442890644 is a wasteful number, since it uses less digits than its factorization.

7442890644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88605855 (or 88605853 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 48.

The square root of 7442890644 is about 86272.1892848443. The cubic root of 7442890644 is about 1952.4528103453.

The spelling of 7442890644 in words is "seven billion, four hundred forty-two million, eight hundred ninety thousand, six hundred forty-four".