190155420 has 432 divisors, whose sum is σ = 767370240. Its totient is φ = 37200384.

The previous prime is 190155419. The next prime is 190155431. The reversal of 190155420 is 24551091.

190155420 is a `hidden beast` number, since 1 + 90 + 1 + 554 + 20 = 666.

190155420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4045837 + ... + 4045883.

It is an arithmetic number, because the mean of its divisors is an integer number (1776320).

Almost surely, 2^190155420 is an apocalyptic number.

190155420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190155420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383685120).

190155420 is an abundant number, since it is smaller than the sum of its proper divisors (577214820).

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

190155420 is a wasteful number, since it uses less digits than its factorization.

190155420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 190155420 is about 13789.6852755964. The cubic root of 190155420 is about 575.0464184329.

The spelling of 190155420 in words is "one hundred ninety million, one hundred fifty-five thousand, four hundred twenty".