1225890684 has 36 divisors (see below), whose sum is σ = 3106543440. Its totient is φ = 407606400.

The previous prime is 1225890683. The next prime is 1225890713. The reversal of 1225890684 is 4860985221.

1225890684 is a `hidden beast` number, since 1 + 2 + 2 + 589 + 0 + 68 + 4 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225890683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28024 + ... + 56895.

Almost surely, 2^1225890684 is an apocalyptic number.

It is an amenable number.

1225890684 is an abundant number, since it is smaller than the sum of its proper divisors (1880652756).

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

1225890684 is a wasteful number, since it uses less digits than its factorization.

1225890684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85330 (or 85325 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 1225890684 is about 35012.7217451029. The cubic root of 1225890684 is about 1070.2467431081.

The spelling of 1225890684 in words is "one billion, two hundred twenty-five million, eight hundred ninety thousand, six hundred eighty-four".