2154877240 has 32 divisors (see below), whose sum is σ = 4863797280. Its totient is φ = 859226752.

The previous prime is 2154877223. The next prime is 2154877253. The reversal of 2154877240 is 427784512.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2154877193 and 2154877202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72292 + ... + 97651.

It is an arithmetic number, because the mean of its divisors is an integer number (151993665).

Almost surely, 2^2154877240 is an apocalyptic number.

2154877240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154877240 is an abundant number, since it is smaller than the sum of its proper divisors (2708920040).

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

2154877240 is a wasteful number, since it uses less digits than its factorization.

2154877240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170271 (or 170267 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 40.

The square root of 2154877240 is about 46420.6553163567. The cubic root of 2154877240 is about 1291.6380928724.

The spelling of 2154877240 in words is "two billion, one hundred fifty-four million, eight hundred seventy-seven thousand, two hundred forty".