55434780 has 120 divisors (see below), whose sum is σ = 183155280. Its totient is φ = 13996800.

The previous prime is 55434763. The next prime is 55434781. The reversal of 55434780 is 8743455.

55434780 is a `hidden beast` number, since 554 + 34 + 78 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55434781) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 29880 + ... + 31680.

It is an arithmetic number, because the mean of its divisors is an integer number (1526294).

Almost surely, 2^55434780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55434780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91577640).

55434780 is an abundant number, since it is smaller than the sum of its proper divisors (127720500).

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

55434780 is a wasteful number, since it uses less digits than its factorization.

55434780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841 (or 1830 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 55434780 is about 7445.4536463536. The cubic root of 55434780 is about 381.2947065732.

The spelling of 55434780 in words is "fifty-five million, four hundred thirty-four thousand, seven hundred eighty".