1011486640 has 80 divisors (see below), whose sum is σ = 2465217216. Its totient is φ = 385228800.

The previous prime is 1011486629. The next prime is 1011486647. The reversal of 1011486640 is 466841101.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1011486647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442300 + ... + 444580.

Almost surely, 2^1011486640 is an apocalyptic number.

1011486640 is a gapful number since it is divisible by the number (10) 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 1011486640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1232608608).

1011486640 is an abundant number, since it is smaller than the sum of its proper divisors (1453730576).

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

1011486640 is a wasteful number, since it uses less digits than its factorization.

1011486640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558 (or 2552 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1011486640 is about 31803.8777509913. The cubic root of 1011486640 is about 1003.8143125219.

The spelling of 1011486640 in words is "one billion, eleven million, four hundred eighty-six thousand, six hundred forty".