2291861600 has 72 divisors (see below), whose sum is σ = 6394309488. Its totient is φ = 785779200.

The previous prime is 2291861587. The next prime is 2291861603. The reversal of 2291861600 is 61681922.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291861603) 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, 199031 + ... + 210230.

It is an arithmetic number, because the mean of its divisors is an integer number (88809854).

Almost surely, 2^2291861600 is an apocalyptic number.

2291861600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2291861600 is an abundant number, since it is smaller than the sum of its proper divisors (4102447888).

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

2291861600 is a wasteful number, since it uses less digits than its factorization.

2291861600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409288 (or 409275 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 2291861600 is about 47873.3913567861. The cubic root of 2291861600 is about 1318.4473633011.

The spelling of 2291861600 in words is "two billion, two hundred ninety-one million, eight hundred sixty-one thousand, six hundred".