55434440 has 16 divisors (see below), whose sum is σ = 124727580. Its totient is φ = 22173760.

The previous prime is 55434427. The next prime is 55434443. The reversal of 55434440 is 4443455.

It can be written as a sum of positive squares in 2 ways, for example, as 55383364 + 51076 = 7442^2 + 226^2 .

It is a super-2 number, since 2×55434440² = 6145954276227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55434443) 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, 692891 + ... + 692970.

Almost surely, 2^55434440 is an apocalyptic number.

It is an amenable number.

55434440 is an abundant number, since it is smaller than the sum of its proper divisors (69293140).

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

55434440 is a wasteful number, since it uses less digits than its factorization.

55434440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385872 (or 1385868 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 55434440 is about 7445.4308135930. The cubic root of 55434440 is about 381.2939270357.

Adding to 55434440 its reverse (4443455), we get a palindrome (59877895).

The spelling of 55434440 in words is "fifty-five million, four hundred thirty-four thousand, four hundred forty".