1011394720 has 96 divisors (see below), whose sum is σ = 2825020800. Its totient is φ = 334795776.

The previous prime is 1011394717. The next prime is 1011394721. The reversal of 1011394720 is 274931101.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1011394721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16911 + ... + 48049.

It is an arithmetic number, because the mean of its divisors is an integer number (29427300).

Almost surely, 2^1011394720 is an apocalyptic number.

1011394720 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 1011394720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1412510400).

1011394720 is an abundant number, since it is smaller than the sum of its proper divisors (1813626080).

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

1011394720 is a wasteful number, since it uses less digits than its factorization.

1011394720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31190 (or 31182 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1011394720 is about 31802.4326113585. The cubic root of 1011394720 is about 1003.7839040112.

The spelling of 1011394720 in words is "one billion, eleven million, three hundred ninety-four thousand, seven hundred twenty".