2261369880 has 512 divisors, whose sum is σ = 9555148800. Its totient is φ = 462067200.

The previous prime is 2261369843. The next prime is 2261369897. The reversal of 2261369880 is 889631622.

2261369880 is a `hidden beast` number, since 22 + 613 + 6 + 9 + 8 + 8 + 0 = 666.

It is a super-2 number, since 2×2261369880² = 10227587468342428800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5904169 + ... + 5904551.

It is an arithmetic number, because the mean of its divisors is an integer number (18662400).

Almost surely, 2^2261369880 is an apocalyptic number.

2261369880 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 2261369880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4777574400).

2261369880 is an abundant number, since it is smaller than the sum of its proper divisors (7293778920).

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

2261369880 is a wasteful number, since it uses less digits than its factorization.

2261369880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 2261369880 is about 47553.8629345714. The cubic root of 2261369880 is about 1312.5742129465.

The spelling of 2261369880 in words is "two billion, two hundred sixty-one million, three hundred sixty-nine thousand, eight hundred eighty".