55569390 has 32 divisors (see below), whose sum is σ = 135060480. Its totient is φ = 14630304.

The previous prime is 55569389. The next prime is 55569407. The reversal of 55569390 is 9396555.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9354 + ... + 14093.

It is an arithmetic number, because the mean of its divisors is an integer number (4220640).

Almost surely, 2^55569390 is an apocalyptic number.

55569390 is an abundant number, since it is smaller than the sum of its proper divisors (79491090).

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

55569390 is a wasteful number, since it uses less digits than its factorization.

55569390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23536.

The product of its (nonzero) digits is 182250, while the sum is 42.

The square root of 55569390 is about 7454.4879099775. The cubic root of 55569390 is about 381.6030845269.

The spelling of 55569390 in words is "fifty-five million, five hundred sixty-nine thousand, three hundred ninety".