1982400380 has 12 divisors (see below), whose sum is σ = 4163040840. Its totient is φ = 792960144.

The previous prime is 1982400377. The next prime is 1982400401. The reversal of 1982400380 is 830042891.

It is a happy number.

It is a super-2 number, since 2×1982400380² = 7859822533248288800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1982400380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49559990 + ... + 49560029.

It is an arithmetic number, because the mean of its divisors is an integer number (346920070).

Almost surely, 2^1982400380 is an apocalyptic number.

1982400380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1982400380 is an abundant number, since it is smaller than the sum of its proper divisors (2180640460).

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

1982400380 is a wasteful number, since it uses less digits than its factorization.

1982400380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99120028 (or 99120026 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1982400380 is about 44524.1550172488. The cubic root of 1982400380 is about 1256.2144675147.

The spelling of 1982400380 in words is "one billion, nine hundred eighty-two million, four hundred thousand, three hundred eighty".