1151210320 has 80 divisors (see below), whose sum is σ = 2900564352. Its totient is φ = 422392320.

The previous prime is 1151210317. The next prime is 1151210363. The reversal of 1151210320 is 230121511.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1151210294 and 1151210303.

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, 166125 + ... + 172915.

Almost surely, 2^1151210320 is an apocalyptic number.

1151210320 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 1151210320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1450282176).

1151210320 is an abundant number, since it is smaller than the sum of its proper divisors (1749354032).

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

1151210320 is a wasteful number, since it uses less digits than its factorization.

1151210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6980 (or 6974 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1151210320 is about 33929.4904176293. The cubic root of 1151210320 is about 1048.0569720208.

Adding to 1151210320 its reverse (230121511), we get a palindrome (1381331831).

The spelling of 1151210320 in words is "one billion, one hundred fifty-one million, two hundred ten thousand, three hundred twenty".