1990381135248 has 100 divisors (see below), whose sum is σ = 6284444185008. Its totient is φ = 603145794240.

The previous prime is 1990381135229. The next prime is 1990381135273. The reversal of 1990381135248 is 8425311830991.

It is a happy number.

1990381135248 is a `hidden beast` number, since 1 + 9 + 9 + 0 + 381 + 13 + 5 + 248 = 666.

It is a super-2 number, since 2×1990381135248² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1990381135194 and 1990381135203.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 69794286 + ... + 69822797.

Almost surely, 2^{1990381135248} is an apocalyptic number.

1990381135248 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1990381135248 is an abundant number, since it is smaller than the sum of its proper divisors (4294063049760).

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

1990381135248 is a wasteful number, since it uses less digits than its factorization.

1990381135248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139617114 (or 139617099 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 1990381135248 in words is "one trillion, nine hundred ninety billion, three hundred eighty-one million, one hundred thirty-five thousand, two hundred forty-eight".