1020280380 has 48 divisors (see below), whose sum is σ = 3264898560. Its totient is φ = 233206848.

The previous prime is 1020280379. The next prime is 1020280399. The reversal of 1020280380 is 830820201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020280380.

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, 1214200 + ... + 1215039.

It is an arithmetic number, because the mean of its divisors is an integer number (68018720).

Almost surely, 2^1020280380 is an apocalyptic number.

1020280380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020280380 is an abundant number, since it is smaller than the sum of its proper divisors (2244618180).

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

1020280380 is a wasteful number, since it uses less digits than its factorization.

1020280380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429258 (or 2429256 counting only the distinct ones).

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

The square root of 1020280380 is about 31941.8280629021. The cubic root of 1020280380 is about 1006.7149353832.

The spelling of 1020280380 in words is "one billion, twenty million, two hundred eighty thousand, three hundred eighty".