1172220500 has 48 divisors (see below), whose sum is σ = 2792881728. Its totient is φ = 426260000.

The previous prime is 1172220473. The next prime is 1172220521. The reversal of 1172220500 is 50222711.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 101066 + ... + 112065.

It is an arithmetic number, because the mean of its divisors is an integer number (58185036).

Almost surely, 2^1172220500 is an apocalyptic number.

1172220500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1172220500 is an abundant number, since it is smaller than the sum of its proper divisors (1620661228).

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

1172220500 is a wasteful number, since it uses less digits than its factorization.

1172220500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213161 (or 213149 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1172220500 is about 34237.7058226745. The cubic root of 1172220500 is about 1054.3944324636.

The spelling of 1172220500 in words is "one billion, one hundred seventy-two million, two hundred twenty thousand, five hundred".