7321898220 has 96 divisors (see below), whose sum is σ = 25232406528. Its totient is φ = 1544838912.

The previous prime is 7321898189. The next prime is 7321898267. The reversal of 7321898220 is 228981237.

It is a happy number.

It is a super-2 number, since 2×7321898220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 665044 + ... + 675963.

It is an arithmetic number, because the mean of its divisors is an integer number (262837568).

Almost surely, 2^7321898220 is an apocalyptic number.

7321898220 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7321898220 is an abundant number, since it is smaller than the sum of its proper divisors (17910508308).

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

7321898220 is a wasteful number, since it uses less digits than its factorization.

7321898220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341039 (or 1341037 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 7321898220 is about 85568.0911321504. The cubic root of 7321898220 is about 1941.8151979883.

The spelling of 7321898220 in words is "seven billion, three hundred twenty-one million, eight hundred ninety-eight thousand, two hundred twenty".