190145820 has 24 divisors (see below), whose sum is σ = 532408464. Its totient is φ = 50705536.

The previous prime is 190145783. The next prime is 190145827. The reversal of 190145820 is 28541091.

It is a happy number.

190145820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190145827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1584489 + ... + 1584608.

It is an arithmetic number, because the mean of its divisors is an integer number (22183686).

Almost surely, 2^190145820 is an apocalyptic number.

190145820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190145820 is an abundant number, since it is smaller than the sum of its proper divisors (342262644).

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

190145820 is a wasteful number, since it uses less digits than its factorization.

190145820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169109 (or 3169107 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 190145820 is about 13789.3371849411. The cubic root of 190145820 is about 575.0367411935.

The spelling of 190145820 in words is "one hundred ninety million, one hundred forty-five thousand, eight hundred twenty".