1011172788 has 48 divisors (see below), whose sum is σ = 2651040000. Its totient is φ = 333267264.

The previous prime is 1011172781. The next prime is 1011172817. The reversal of 1011172788 is 8872711101.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011172781) 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, 42988 + ... + 62211.

It is an arithmetic number, because the mean of its divisors is an integer number (55230000).

Almost surely, 2^1011172788 is an apocalyptic number.

1011172788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1011172788 is an abundant number, since it is smaller than the sum of its proper divisors (1639867212).

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

1011172788 is a wasteful number, since it uses less digits than its factorization.

1011172788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105301 (or 105293 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 36.

The square root of 1011172788 is about 31798.9431899867. The cubic root of 1011172788 is about 1003.7104779916.

Adding to 1011172788 its reverse (8872711101), we get a palindrome (9883883889).

It can be divided in two parts, 101 and 1172788, that added together give a square (1172889 = 1083²).

The spelling of 1011172788 in words is "one billion, eleven million, one hundred seventy-two thousand, seven hundred eighty-eight".