190781430 has 64 divisors (see below), whose sum is σ = 541347840. Its totient is φ = 42102144.

The previous prime is 190781419. The next prime is 190781453. The reversal of 190781430 is 34187091.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 190781391 and 190781400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9574 + ... + 21753.

It is an arithmetic number, because the mean of its divisors is an integer number (8458560).

Almost surely, 2^190781430 is an apocalyptic number.

190781430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190781430 is an abundant number, since it is smaller than the sum of its proper divisors (350566410).

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

190781430 is a wasteful number, since it uses less digits than its factorization.

190781430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31373.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 190781430 is about 13812.3651124635. The cubic root of 190781430 is about 575.6767633272.

The spelling of 190781430 in words is "one hundred ninety million, seven hundred eighty-one thousand, four hundred thirty".