1008764644 has 24 divisors (see below), whose sum is σ = 1859941440. Its totient is φ = 477401184.

The previous prime is 1008764639. The next prime is 1008764651. The reversal of 1008764644 is 4464678001.

It is a super-2 number, since 2×1008764644² = 2035212213968893472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1008764597 and 1008764606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87522 + ... + 98374.

It is an arithmetic number, because the mean of its divisors is an integer number (77497560).

Almost surely, 2^1008764644 is an apocalyptic number.

It is an amenable number.

1008764644 is a deficient number, since it is larger than the sum of its proper divisors (851176796).

1008764644 is a wasteful number, since it uses less digits than its factorization.

1008764644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12099 (or 12097 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 1008764644 is about 31761.0554610517. The cubic root of 1008764644 is about 1002.9130538772.

The spelling of 1008764644 in words is "one billion, eight million, seven hundred sixty-four thousand, six hundred forty-four".