190890378 has 96 divisors (see below), whose sum is σ = 519566400. Its totient is φ = 51655968.

The previous prime is 190890377. The next prime is 190890389. The reversal of 190890378 is 873098091.

190890378 is a `hidden beast` number, since 190 + 8 + 90 + 378 = 666.

It is not an unprimeable number, because it can be changed into a prime (190890377) 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 47 ways as a sum of consecutive naturals, for example, 48376 + ... + 52172.

It is an arithmetic number, because the mean of its divisors is an integer number (5412150).

Almost surely, 2^190890378 is an apocalyptic number.

190890378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190890378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259783200).

190890378 is an abundant number, since it is smaller than the sum of its proper divisors (328676022).

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

190890378 is a wasteful number, since it uses less digits than its factorization.

190890378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841 (or 3828 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 190890378 is about 13816.3084070963. The cubic root of 190890378 is about 575.7863248239.

The spelling of 190890378 in words is "one hundred ninety million, eight hundred ninety thousand, three hundred seventy-eight".