1990436160790 has 256 divisors, whose sum is σ = 4663815045120. Its totient is φ = 593536896000.

The previous prime is 1990436160703. The next prime is 1990436160859. The reversal of 1990436160790 is 970616340991.

It is a happy number.

It is a super-2 number, since 2×1990436160790² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 872614450 + ... + 872616730.

It is an arithmetic number, because the mean of its divisors is an integer number (18218027520).

Almost surely, 2^{1990436160790} is an apocalyptic number.

1990436160790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1990436160790 is an abundant number, since it is smaller than the sum of its proper divisors (2673378884330).

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

1990436160790 is a wasteful number, since it uses less digits than its factorization.

1990436160790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The spelling of 1990436160790 in words is "one trillion, nine hundred ninety billion, four hundred thirty-six million, one hundred sixty thousand, seven hundred ninety".