2245649728 has 56 divisors (see below), whose sum is σ = 5118608000. Its totient is φ = 957547008.

The previous prime is 2245649717. The next prime is 2245649737. The reversal of 2245649728 is 8279465422.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76558 + ... + 101746.

Almost surely, 2^2245649728 is an apocalyptic number.

2245649728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2245649728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2559304000).

2245649728 is an abundant number, since it is smaller than the sum of its proper divisors (2872958272).

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

2245649728 is a wasteful number, since it uses less digits than its factorization.

2245649728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25407 (or 25397 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 49.

The square root of 2245649728 is about 47388.2868228004. The cubic root of 2245649728 is about 1309.5256383237.

The spelling of 2245649728 in words is "two billion, two hundred forty-five million, six hundred forty-nine thousand, seven hundred twenty-eight".