2931825780 has 480 divisors, whose sum is σ = 11064936960. Its totient is φ = 641986560.

The previous prime is 2931825769. The next prime is 2931825833. The reversal of 2931825780 is 875281392.

It is a happy number.

2931825780 is a `hidden beast` number, since 2 + 9 + 318 + 257 + 80 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 6802165 + ... + 6802595.

It is an arithmetic number, because the mean of its divisors is an integer number (23051952).

Almost surely, 2^2931825780 is an apocalyptic number.

2931825780 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 2931825780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5532468480).

2931825780 is an abundant number, since it is smaller than the sum of its proper divisors (8133111180).

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

2931825780 is a wasteful number, since it uses less digits than its factorization.

2931825780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 2931825780 is about 54146.3367181936. The cubic root of 2931825780 is about 1431.2408386490.

The spelling of 2931825780 in words is "two billion, nine hundred thirty-one million, eight hundred twenty-five thousand, seven hundred eighty".