1283457420 has 96 divisors (see below), whose sum is σ = 4563417600. Its totient is φ = 293360832.

The previous prime is 1283457419. The next prime is 1283457479. The reversal of 1283457420 is 247543821.

It is a happy number.

1283457420 is a `hidden beast` number, since 1 + 2 + 83 + 4 + 574 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165990 + ... + 173549.

It is an arithmetic number, because the mean of its divisors is an integer number (47535600).

Almost surely, 2^1283457420 is an apocalyptic number.

1283457420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1283457420 is an abundant number, since it is smaller than the sum of its proper divisors (3279960180).

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

1283457420 is a wasteful number, since it uses less digits than its factorization.

1283457420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339564 (or 339556 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 1283457420 is about 35825.3739687390. The cubic root of 1283457420 is about 1086.7437596118.

The spelling of 1283457420 in words is "one billion, two hundred eighty-three million, four hundred fifty-seven thousand, four hundred twenty".