55698390 has 96 divisors (see below), whose sum is σ = 159584256. Its totient is φ = 13366080.

The previous prime is 55698361. The next prime is 55698427. The reversal of 55698390 is 9389655.

55698390 is a `hidden beast` number, since 5 + 569 + 83 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125509 + ... + 125951.

It is an arithmetic number, because the mean of its divisors is an integer number (1662336).

Almost surely, 2^55698390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55698390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79792128).

55698390 is an abundant number, since it is smaller than the sum of its proper divisors (103885866).

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

55698390 is a wasteful number, since it uses less digits than its factorization.

55698390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 55698390 is about 7463.1354000849. The cubic root of 55698390 is about 381.8981435807.

The spelling of 55698390 in words is "fifty-five million, six hundred ninety-eight thousand, three hundred ninety".