55043490 has 16 divisors (see below), whose sum is σ = 132104448. Its totient is φ = 14678256.

The previous prime is 55043477. The next prime is 55043491. The reversal of 55043490 is 9434055.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1834783 = 55043490 / (5 + 5 + 0 + 4 + 3 + 4 + 9 + 0).

It is not an unprimeable number, because it can be changed into a prime (55043491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 917362 + ... + 917421.

It is an arithmetic number, because the mean of its divisors is an integer number (8256528).

Almost surely, 2^55043490 is an apocalyptic number.

55043490 is an abundant number, since it is smaller than the sum of its proper divisors (77060958).

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

55043490 is a wasteful number, since it uses less digits than its factorization.

55043490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834793.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 55043490 is about 7419.1300029047. The cubic root of 55043490 is about 380.3954562754.

The spelling of 55043490 in words is "fifty-five million, forty-three thousand, four hundred ninety".