1285493376 has 128 divisors (see below), whose sum is σ = 3525560640. Its totient is φ = 414801920.

The previous prime is 1285493371. The next prime is 1285493383. The reversal of 1285493376 is 6733945821.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1285493371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1688836 + ... + 1689596.

Almost surely, 2^1285493376 is an apocalyptic number.

1285493376 is a gapful number since it is divisible by the number (16) 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 1285493376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1762780320).

1285493376 is an abundant number, since it is smaller than the sum of its proper divisors (2240067264).

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

1285493376 is an equidigital number, since it uses as much as digits as its factorization.

1285493376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914 (or 902 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 1285493376 is about 35853.7777089110. Note that the first 4 decimals coincide. The cubic root of 1285493376 is about 1087.3180920205.

The spelling of 1285493376 in words is "one billion, two hundred eighty-five million, four hundred ninety-three thousand, three hundred seventy-six".