55387434 has 16 divisors (see below), whose sum is σ = 110861280. Its totient is φ = 18448080.

The previous prime is 55387403. The next prime is 55387441. The reversal of 55387434 is 43478355.

It is a junction number, because it is equal to n+sod(n) for n = 55387392 and 55387401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7249 + ... + 12779.

It is an arithmetic number, because the mean of its divisors is an integer number (6928830).

Almost surely, 2^55387434 is an apocalyptic number.

55387434 is an abundant number, since it is smaller than the sum of its proper divisors (55473846).

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

55387434 is a wasteful number, since it uses less digits than its factorization.

55387434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7205.

The product of its digits is 201600, while the sum is 39.

The square root of 55387434 is about 7442.2734429743. The cubic root of 55387434 is about 381.1861229899.

The spelling of 55387434 in words is "fifty-five million, three hundred eighty-seven thousand, four hundred thirty-four".