55489784 has 16 divisors (see below), whose sum is σ = 118906800. Its totient is φ = 23781312.

The previous prime is 55489771. The next prime is 55489793. The reversal of 55489784 is 48798455.

It is a super-2 number, since 2×55489784² = 6158232256733312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495389 + ... + 495500.

It is an arithmetic number, because the mean of its divisors is an integer number (7431675).

Almost surely, 2^55489784 is an apocalyptic number.

It is an amenable number.

55489784 is an abundant number, since it is smaller than the sum of its proper divisors (63417016).

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

55489784 is a wasteful number, since it uses less digits than its factorization.

55489784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990902 (or 990898 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 50.

The square root of 55489784 is about 7449.1465282944. The cubic root of 55489784 is about 381.4207754495.

The spelling of 55489784 in words is "fifty-five million, four hundred eighty-nine thousand, seven hundred eighty-four".