7389455840 has 96 divisors (see below), whose sum is σ = 18859036896. Its totient is φ = 2719918080.

The previous prime is 7389455839. The next prime is 7389455897. The reversal of 7389455840 is 485549837.

It is a super-2 number, since 2×7389455840² (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, 683114 + ... + 693846.

It is an arithmetic number, because the mean of its divisors is an integer number (196448301).

Almost surely, 2^7389455840 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 7389455840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9429518448).

7389455840 is an abundant number, since it is smaller than the sum of its proper divisors (11469581056).

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

7389455840 is a wasteful number, since it uses less digits than its factorization.

7389455840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092 (or 11084 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 53.

The square root of 7389455840 is about 85961.9441380894. The cubic root of 7389455840 is about 1947.7691639553.

The spelling of 7389455840 in words is "seven billion, three hundred eighty-nine million, four hundred fifty-five thousand, eight hundred forty".