1225288988 has 48 divisors (see below), whose sum is σ = 2703456000. Its totient is φ = 472010880.

The previous prime is 1225288963. The next prime is 1225288997. The reversal of 1225288988 is 8898825221.

It is a super-2 number, since 2×1225288988² = 3002666208228128288, which contains 22 as substring.

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, 5063 + ... + 49761.

It is an arithmetic number, because the mean of its divisors is an integer number (56322000).

Almost surely, 2^1225288988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225288988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1351728000).

1225288988 is an abundant number, since it is smaller than the sum of its proper divisors (1478167012).

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

1225288988 is a wasteful number, since it uses less digits than its factorization.

1225288988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44810 (or 44808 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 53.

The square root of 1225288988 is about 35004.1281565475. The cubic root of 1225288988 is about 1070.0716136888.

The spelling of 1225288988 in words is "one billion, two hundred twenty-five million, two hundred eighty-eight thousand, nine hundred eighty-eight".