1861722996 has 24 divisors (see below), whose sum is σ = 4964594880. Its totient is φ = 531920832.

The previous prime is 1861722991. The next prime is 1861723013. The reversal of 1861722996 is 6992271681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861722991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11081601 + ... + 11081768.

It is an arithmetic number, because the mean of its divisors is an integer number (206858120).

Almost surely, 2^1861722996 is an apocalyptic number.

It is an amenable number.

1861722996 is an abundant number, since it is smaller than the sum of its proper divisors (3102871884).

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

1861722996 is a wasteful number, since it uses less digits than its factorization.

1861722996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22163383 (or 22163381 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The square root of 1861722996 is about 43147.6881883607. The cubic root of 1861722996 is about 1230.1885704676.

The spelling of 1861722996 in words is "one billion, eight hundred sixty-one million, seven hundred twenty-two thousand, nine hundred ninety-six".