190938420 has 36 divisors (see below), whose sum is σ = 579180420. Its totient is φ = 50916864.

The previous prime is 190938401. The next prime is 190938439. The reversal of 190938420 is 24839091.

It is an interprime number because it is at equal distance from previous prime (190938401) and next prime (190938439).

It can be written as a sum of positive squares in 2 ways, for example, as 68260644 + 122677776 = 8262^2 + 11076^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 530205 + ... + 530564.

It is an arithmetic number, because the mean of its divisors is an integer number (16088345).

Almost surely, 2^190938420 is an apocalyptic number.

190938420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190938420 is an abundant number, since it is smaller than the sum of its proper divisors (388242000).

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

190938420 is a wasteful number, since it uses less digits than its factorization.

190938420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060784 (or 1060779 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 190938420 is about 13818.0468952743. The cubic root of 190938420 is about 575.8346241090.

The spelling of 190938420 in words is "one hundred ninety million, nine hundred thirty-eight thousand, four hundred twenty".