55377890 has 8 divisors (see below), whose sum is σ = 99680220. Its totient is φ = 22151152.

The previous prime is 55377871. The next prime is 55377893. The reversal of 55377890 is 9877355.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55368481 + 9409 = 7441^2 + 97^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (55377893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2768885 + ... + 2768904.

Almost surely, 2^55377890 is an apocalyptic number.

55377890 is a deficient number, since it is larger than the sum of its proper divisors (44302330).

55377890 is a wasteful number, since it uses less digits than its factorization.

55377890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5537796.

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 55377890 is about 7441.6322134327. The cubic root of 55377890 is about 381.1642272332.

The spelling of 55377890 in words is "fifty-five million, three hundred seventy-seven thousand, eight hundred ninety".