55784190 has 256 divisors, whose sum is σ = 185794560. Its totient is φ = 10368000.

The previous prime is 55784189. The next prime is 55784207. The reversal of 55784190 is 9148755.

It is a super-2 number, since 2×55784190² = 6223751707912200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1360570 + ... + 1360610.

It is an arithmetic number, because the mean of its divisors is an integer number (725760).

Almost surely, 2^55784190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55784190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92897280).

55784190 is an abundant number, since it is smaller than the sum of its proper divisors (130010370).

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

55784190 is a wasteful number, since it uses less digits than its factorization.

55784190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 55784190 is about 7468.8814423580. The cubic root of 55784190 is about 382.0941399700.

The spelling of 55784190 in words is "fifty-five million, seven hundred eighty-four thousand, one hundred ninety".