190397550 has 96 divisors (see below), whose sum is σ = 552321792. Its totient is φ = 42497280.

The previous prime is 190397533. The next prime is 190397579. The reversal of 190397550 is 55793091.

It is a junction number, because it is equal to n+sod(n) for n = 190397499 and 190397508.

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, 43042 + ... + 47258.

It is an arithmetic number, because the mean of its divisors is an integer number (5753352).

Almost surely, 2^190397550 is an apocalyptic number.

190397550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190397550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276160896).

190397550 is an abundant number, since it is smaller than the sum of its proper divisors (361924242).

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

190397550 is a wasteful number, since it uses less digits than its factorization.

190397550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282 (or 4277 counting only the distinct ones).

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 190397550 is about 13798.4618708028. The cubic root of 190397550 is about 575.2903889236.

The spelling of 190397550 in words is "one hundred ninety million, three hundred ninety-seven thousand, five hundred fifty".