2920121280 has 504 divisors, whose sum is σ = 11268352368. Its totient is φ = 717299712.

The previous prime is 2920121261. The next prime is 2920121317. The reversal of 2920121280 is 821210292.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 62130217 + ... + 62130263.

It is an arithmetic number, because the mean of its divisors is an integer number (22357842).

Almost surely, 2^2920121280 is an apocalyptic number.

2920121280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2920121280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5634176184).

2920121280 is an abundant number, since it is smaller than the sum of its proper divisors (8348231088).

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

2920121280 is an equidigital number, since it uses as much as digits as its factorization.

2920121280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 2920121280 is about 54038.1465263197. The cubic root of 2920121280 is about 1429.3336879810. Note that the first 3 decimals are identical.

The spelling of 2920121280 in words is "two billion, nine hundred twenty million, one hundred twenty-one thousand, two hundred eighty".