2154400434 has 12 divisors (see below), whose sum is σ = 4667867646. Its totient is φ = 718133472.

The previous prime is 2154400433. The next prime is 2154400439. The reversal of 2154400434 is 4340044512.

It is a happy number.

2154400434 is a `hidden beast` number, since 215 + 4 + 400 + 43 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1664884809 + 489515625 = 40803^2 + 22125^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2154400398 and 2154400407.

It is not an unprimeable number, because it can be changed into a prime (2154400433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59844439 + ... + 59844474.

Almost surely, 2^2154400434 is an apocalyptic number.

2154400434 is an abundant number, since it is smaller than the sum of its proper divisors (2513467212).

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

2154400434 is a wasteful number, since it uses less digits than its factorization.

2154400434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119688921 (or 119688918 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 2154400434 is about 46415.5193227438. The cubic root of 2154400434 is about 1291.5428196614.

Adding to 2154400434 its reverse (4340044512), we get a palindrome (6494444946).

The spelling of 2154400434 in words is "two billion, one hundred fifty-four million, four hundred thousand, four hundred thirty-four".