1145420380 has 48 divisors (see below), whose sum is σ = 2593531584. Its totient is φ = 422415360.

The previous prime is 1145420327. The next prime is 1145420411. The reversal of 1145420380 is 830245411.

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, 265924 + ... + 270196.

It is an arithmetic number, because the mean of its divisors is an integer number (54031908).

Almost surely, 2^1145420380 is an apocalyptic number.

1145420380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145420380 is an abundant number, since it is smaller than the sum of its proper divisors (1448111204).

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

1145420380 is a wasteful number, since it uses less digits than its factorization.

1145420380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326 (or 5324 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1145420380 is about 33844.0597446583. The cubic root of 1145420380 is about 1046.2969725407.

Adding to 1145420380 its reverse (830245411), we get a palindrome (1975665791).

The spelling of 1145420380 in words is "one billion, one hundred forty-five million, four hundred twenty thousand, three hundred eighty".