288621952380 has 144 divisors (see below), whose sum is σ = 916243167840. Its totient is φ = 76259605248.

The previous prime is 288621952373. The next prime is 288621952403. The reversal of 288621952380 is 83259126882.

It is a happy number.

288621952380 is a `hidden beast` number, since 2 + 8 + 8 + 621 + 9 + 5 + 2 + 3 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 257322 + ... + 802158.

Almost surely, 2^288621952380 is an apocalyptic number.

288621952380 is a gapful number since it is divisible by the number (20) 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 288621952380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458121583920).

288621952380 is an abundant number, since it is smaller than the sum of its proper divisors (627621215460).

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

288621952380 is a wasteful number, since it uses less digits than its factorization.

288621952380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544970 (or 544956 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 288621952380 in words is "two hundred eighty-eight billion, six hundred twenty-one million, nine hundred fifty-two thousand, three hundred eighty".