7212259890 has 192 divisors, whose sum is σ = 20896911360. Its totient is φ = 1711163520.

The previous prime is 7212259871. The next prime is 7212259907. The reversal of 7212259890 is 989522127.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15056671 + ... + 15057149.

It is an arithmetic number, because the mean of its divisors is an integer number (108838080).

Almost surely, 2^7212259890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7212259890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10448455680).

7212259890 is an abundant number, since it is smaller than the sum of its proper divisors (13684651470).

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

7212259890 is a wasteful number, since it uses less digits than its factorization.

7212259890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 7212259890 is about 84925.0251103878. The cubic root of 7212259890 is about 1932.0741471357.

The spelling of 7212259890 in words is "seven billion, two hundred twelve million, two hundred fifty-nine thousand, eight hundred ninety".