180621420 has 192 divisors, whose sum is σ = 606735360. Its totient is φ = 39287808.

The previous prime is 180621409. The next prime is 180621433. The reversal of 180621420 is 24126081.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 916762 + ... + 916958.

It is an arithmetic number, because the mean of its divisors is an integer number (3160080).

Almost surely, 2^180621420 is an apocalyptic number.

180621420 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 180621420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303367680).

180621420 is an abundant number, since it is smaller than the sum of its proper divisors (426113940).

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

180621420 is a wasteful number, since it uses less digits than its factorization.

180621420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 180621420 is about 13439.5468673613. The cubic root of 180621420 is about 565.2706250470.

The spelling of 180621420 in words is "one hundred eighty million, six hundred twenty-one thousand, four hundred twenty".