2921137380 has 144 divisors (see below), whose sum is σ = 10269552384. Its totient is φ = 658264320.

The previous prime is 2921137367. The next prime is 2921137393. The reversal of 2921137380 is 837311292.

It is an interprime number because it is at equal distance from previous prime (2921137367) and next prime (2921137393).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73134 + ... + 105786.

It is an arithmetic number, because the mean of its divisors is an integer number (71316336).

Almost surely, 2^2921137380 is an apocalyptic number.

2921137380 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 2921137380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5134776192).

2921137380 is an abundant number, since it is smaller than the sum of its proper divisors (7348415004).

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

2921137380 is a wasteful number, since it uses less digits than its factorization.

2921137380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32746 (or 32741 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 2921137380 is about 54047.5474004140. The cubic root of 2921137380 is about 1429.4994547875.

The spelling of 2921137380 in words is "two billion, nine hundred twenty-one million, one hundred thirty-seven thousand, three hundred eighty".