1890445142 has 8 divisors (see below), whose sum is σ = 2836614816. Its totient is φ = 944906872.

The previous prime is 1890445121. The next prime is 1890445171. The reversal of 1890445142 is 2415440981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1890445142³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1890445096 and 1890445105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150293 + ... + 162384.

It is an arithmetic number, because the mean of its divisors is an integer number (354576852).

Almost surely, 2^1890445142 is an apocalyptic number.

1890445142 is a deficient number, since it is larger than the sum of its proper divisors (946169674).

1890445142 is a wasteful number, since it uses less digits than its factorization.

1890445142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315702.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 1890445142 is about 43479.2495565413. The cubic root of 1890445142 is about 1236.4826488405.

It can be divided in two parts, 18904 and 45142, that added together give a palindrome (64046).

The spelling of 1890445142 in words is "one billion, eight hundred ninety million, four hundred forty-five thousand, one hundred forty-two".