1790489405 has 4 divisors (see below), whose sum is σ = 2148587292. Its totient is φ = 1432391520.

The previous prime is 1790489359. The next prime is 1790489471. The reversal of 1790489405 is 5049840971.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1374778084 + 415711321 = 37078^2 + 20389^2 .

It is not a de Polignac number, because 1790489405 - 2¹⁸ = 1790227261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1790489405.

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, 179048936 + ... + 179048945.

It is an arithmetic number, because the mean of its divisors is an integer number (537146823).

Almost surely, 2^1790489405 is an apocalyptic number.

It is an amenable number.

1790489405 is a deficient number, since it is larger than the sum of its proper divisors (358097887).

1790489405 is an equidigital number, since it uses as much as digits as its factorization.

1790489405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358097886.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1790489405 is about 42314.1749890034. The cubic root of 1790489405 is about 1214.2941939859.

The spelling of 1790489405 in words is "one billion, seven hundred ninety million, four hundred eighty-nine thousand, four hundred five".