2269745640 has 96 divisors (see below), whose sum is σ = 7459662600. Its totient is φ = 598456320.

The previous prime is 2269745627. The next prime is 2269745659. The reversal of 2269745640 is 465479622.

2269745640 is a `hidden beast` number, since 22 + 69 + 7 + 4 + 564 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1463980644 + 805764996 = 38262^2 + 28386^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3381 + ... + 67460.

Almost surely, 2^2269745640 is an apocalyptic number.

2269745640 is a gapful number since it is divisible by the number (20) 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 2269745640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3729831300).

2269745640 is an abundant number, since it is smaller than the sum of its proper divisors (5189916960).

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

2269745640 is a wasteful number, since it uses less digits than its factorization.

2269745640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70947 (or 70940 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 2269745640 is about 47641.8475712267. The cubic root of 2269745640 is about 1314.1927394622.

The spelling of 2269745640 in words is "two billion, two hundred sixty-nine million, seven hundred forty-five thousand, six hundred forty".