1090633644 has 36 divisors (see below), whose sum is σ = 2803611720. Its totient is φ = 357382080.

The previous prime is 1090633633. The next prime is 1090633669. The reversal of 1090633644 is 4463360901.

1090633644 is a `hidden beast` number, since 1 + 0 + 9 + 0 + 6 + 3 + 3 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1090633599 and 1090633608.

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, 254617 + ... + 258864.

Almost surely, 2^1090633644 is an apocalyptic number.

It is an amenable number.

1090633644 is an abundant number, since it is smaller than the sum of its proper divisors (1712978076).

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

1090633644 is a wasteful number, since it uses less digits than its factorization.

1090633644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513550 (or 513545 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 1090633644 is about 33024.7429058880. The cubic root of 1090633644 is about 1029.3418499438.

The spelling of 1090633644 in words is "one billion, ninety million, six hundred thirty-three thousand, six hundred forty-four".