1090400602 has 4 divisors (see below), whose sum is σ = 1635600906. Its totient is φ = 545200300.

The previous prime is 1090400569. The next prime is 1090400659. The reversal of 1090400602 is 2060040901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2060040901 = 7229 ⋅284969.

It can be written as a sum of positive squares in only one way, i.e., 1090386441 + 14161 = 33021^2 + 119^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272600149 + ... + 272600152.

Almost surely, 2^1090400602 is an apocalyptic number.

1090400602 is a deficient number, since it is larger than the sum of its proper divisors (545200304).

1090400602 is an equidigital number, since it uses as much as digits as its factorization.

1090400602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545200303.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1090400602 is about 33021.2144234581. The cubic root of 1090400602 is about 1029.2685295787.

The spelling of 1090400602 in words is "one billion, ninety million, four hundred thousand, six hundred two".