55390416 has 20 divisors (see below), whose sum is σ = 143092032. Its totient is φ = 18463456.

The previous prime is 55390411. The next prime is 55390427. The reversal of 55390416 is 61409355.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55390411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576936 + ... + 577031.

Almost surely, 2^55390416 is an apocalyptic number.

It is an amenable number.

55390416 is an abundant number, since it is smaller than the sum of its proper divisors (87701616).

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

55390416 is a wasteful number, since it uses less digits than its factorization.

55390416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153978 (or 1153972 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 55390416 is about 7442.4737822850. The cubic root of 55390416 is about 381.1929637511.

The spelling of 55390416 in words is "fifty-five million, three hundred ninety thousand, four hundred sixteen".