190440000 has 315 divisors, whose sum is σ = 713055343. Its totient is φ = 48576000.

The previous prime is 190439989. The next prime is 190440011. The reversal of 190440000 is 44091.

The square root of 190440000 is 13800.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (190439989) and next prime (190440011).

It can be written as a sum of positive squares in 2 ways, for example, as 14930496 + 175509504 = 3864^2 + 13248^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 8279989 + ... + 8280011.

Almost surely, 2^190440000 is an apocalyptic number.

190440000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190440000 is the 13800-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190440000

190440000 is an abundant number, since it is smaller than the sum of its proper divisors (522615343).

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

190440000 is an equidigital number, since it uses as much as digits as its factorization.

190440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The cubic root of 190440000 is about 575.3331402831. Note that the first 3 decimals are identical.

Multiplying 190440000 by its product of nonzero digits (144), we get a square (27423360000 = 165600²).

190440000 divided by its product of nonzero digits (144) gives a square (1322500 = 1150²).

Adding to 190440000 its reverse (44091), we get a palindrome (190484091).

The spelling of 190440000 in words is "one hundred ninety million, four hundred forty thousand".