1011890872 has 8 divisors (see below), whose sum is σ = 1897295400. Its totient is φ = 505945432.

The previous prime is 1011890861. The next prime is 1011890879. The reversal of 1011890872 is 2780981101.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011890879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63243172 + ... + 63243187.

It is an arithmetic number, because the mean of its divisors is an integer number (237161925).

Almost surely, 2^1011890872 is an apocalyptic number.

It is an amenable number.

1011890872 is a deficient number, since it is larger than the sum of its proper divisors (885404528).

1011890872 is a wasteful number, since it uses less digits than its factorization.

1011890872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126486365 (or 126486361 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 37.

The square root of 1011890872 is about 31810.2321902875. The cubic root of 1011890872 is about 1003.9480166522.

The spelling of 1011890872 in words is "one billion, eleven million, eight hundred ninety thousand, eight hundred seventy-two".