2721972924 has 90 divisors (see below), whose sum is σ = 7821584232. Its totient is φ = 824828400.

The previous prime is 2721972923. The next prime is 2721972977. The reversal of 2721972924 is 4292791272.

It is a happy number.

2721972924 is a `hidden beast` number, since 272 + 1 + 97 + 292 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2721972924.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721972923) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4489 + ... + 73919.

Almost surely, 2^2721972924 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 2721972924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3910792116).

2721972924 is an abundant number, since it is smaller than the sum of its proper divisors (5099611308).

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

2721972924 is a wasteful number, since it uses less digits than its factorization.

2721972924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69469 (or 69447 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 2721972924 is about 52172.5303584175. The cubic root of 2721972924 is about 1396.2438299282.

The spelling of 2721972924 in words is "two billion, seven hundred twenty-one million, nine hundred seventy-two thousand, nine hundred twenty-four".