2921767940 has 144 divisors (see below), whose sum is σ = 7971812352. Its totient is φ = 875826432.

The previous prime is 2921767897. The next prime is 2921767957. The reversal of 2921767940 is 497671292.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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, 654797 + ... + 659243.

It is an arithmetic number, because the mean of its divisors is an integer number (55359808).

Almost surely, 2^2921767940 is an apocalyptic number.

2921767940 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 2921767940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3985906176).

2921767940 is an abundant number, since it is smaller than the sum of its proper divisors (5050044412).

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

2921767940 is a wasteful number, since it uses less digits than its factorization.

2921767940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514 (or 4493 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 2921767940 is about 54053.3804678301. The cubic root of 2921767940 is about 1429.6023051741.

The spelling of 2921767940 in words is "two billion, nine hundred twenty-one million, seven hundred sixty-seven thousand, nine hundred forty".