1011689904 has 80 divisors (see below), whose sum is σ = 2648973312. Its totient is φ = 332688384.

The previous prime is 1011689897. The next prime is 1011689947. The reversal of 1011689904 is 4099861101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2077149 + ... + 2077635.

Almost surely, 2^1011689904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1011689904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324486656).

1011689904 is an abundant number, since it is smaller than the sum of its proper divisors (1637283408).

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

1011689904 is a wasteful number, since it uses less digits than its factorization.

1011689904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994 (or 988 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 1011689904 is about 31807.0731756319. The cubic root of 1011689904 is about 1003.8815487523.

The spelling of 1011689904 in words is "one billion, eleven million, six hundred eighty-nine thousand, nine hundred four".