1990523144 has 48 divisors (see below), whose sum is σ = 4059781200. Its totient is φ = 912396960.

The previous prime is 1990523131. The next prime is 1990523153. The reversal of 1990523144 is 4413250991.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 1990523098 and 1990523107.

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, 139259 + ... + 152885.

It is an arithmetic number, because the mean of its divisors is an integer number (84578775).

Almost surely, 2^1990523144 is an apocalyptic number.

It is an amenable number.

1990523144 is an abundant number, since it is smaller than the sum of its proper divisors (2069258056).

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

1990523144 is a wasteful number, since it uses less digits than its factorization.

1990523144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13714 (or 13679 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1990523144 is about 44615.2792661886. The cubic root of 1990523144 is about 1257.9278833531.

The spelling of 1990523144 in words is "one billion, nine hundred ninety million, five hundred twenty-three thousand, one hundred forty-four".