1990253142 has 12 divisors (see below), whose sum is σ = 4312215180. Its totient is φ = 663417708.

The previous prime is 1990253137. The next prime is 1990253159. The reversal of 1990253142 is 2413520991.

It is a super-2 number, since 2×1990253142² = 7922215138481744328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1990253097 and 1990253106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55284792 + ... + 55284827.

It is an arithmetic number, because the mean of its divisors is an integer number (359351265).

Almost surely, 2^1990253142 is an apocalyptic number.

1990253142 is an abundant number, since it is smaller than the sum of its proper divisors (2321962038).

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

1990253142 is a wasteful number, since it uses less digits than its factorization.

1990253142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110569627 (or 110569624 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1990253142 is about 44612.2532719431. The cubic root of 1990253142 is about 1257.8710041012.

The spelling of 1990253142 in words is "one billion, nine hundred ninety million, two hundred fifty-three thousand, one hundred forty-two".