2154398432 has 24 divisors (see below), whose sum is σ = 4272440256. Its totient is φ = 1069334272.

The previous prime is 2154398419. The next prime is 2154398437. The reversal of 2154398432 is 2348934512.

It is a self number, because there is not a number n which added to its sum of digits gives 2154398432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154398437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241328 + ... + 250095.

It is an arithmetic number, because the mean of its divisors is an integer number (178018344).

Almost surely, 2^2154398432 is an apocalyptic number.

It is an amenable number.

2154398432 is a deficient number, since it is larger than the sum of its proper divisors (2118041824).

2154398432 is a wasteful number, since it uses less digits than its factorization.

2154398432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491570 (or 491562 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The square root of 2154398432 is about 46415.4977566761. The cubic root of 2154398432 is about 1291.5424196012.

The spelling of 2154398432 in words is "two billion, one hundred fifty-four million, three hundred ninety-eight thousand, four hundred thirty-two".