1137631220 has 96 divisors (see below), whose sum is σ = 2718334080. Its totient is φ = 396264960.

The previous prime is 1137631217. The next prime is 1137631237. The reversal of 1137631220 is 221367311.

It is a super-3 number, since 3×1137631220³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1137631220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 500246 + ... + 502514.

It is an arithmetic number, because the mean of its divisors is an integer number (28315980).

Almost surely, 2^1137631220 is an apocalyptic number.

1137631220 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 1137631220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1359167040).

1137631220 is an abundant number, since it is smaller than the sum of its proper divisors (1580702860).

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

1137631220 is a wasteful number, since it uses less digits than its factorization.

1137631220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2385 (or 2383 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 1137631220 is about 33728.7891866874. The cubic root of 1137631220 is about 1043.9198778321.

Adding to 1137631220 its reverse (221367311), we get a palindrome (1358998531).

The spelling of 1137631220 in words is "one billion, one hundred thirty-seven million, six hundred thirty-one thousand, two hundred twenty".