2391764880 has 40 divisors (see below), whose sum is σ = 7414471872. Its totient is φ = 637803904.

The previous prime is 2391764863. The next prime is 2391764887. The reversal of 2391764880 is 884671932.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (2391764887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4982604 + ... + 4983083.

Almost surely, 2^2391764880 is an apocalyptic number.

2391764880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2391764880 is an abundant number, since it is smaller than the sum of its proper divisors (5022706992).

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

2391764880 is a wasteful number, since it uses less digits than its factorization.

2391764880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9965703 (or 9965697 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 2391764880 is about 48905.6732905294. The cubic root of 2391764880 is about 1337.3327951228.

The spelling of 2391764880 in words is "two billion, three hundred ninety-one million, seven hundred sixty-four thousand, eight hundred eighty".