1285167960 has 96 divisors (see below), whose sum is σ = 4278718080. Its totient is φ = 334348800.

The previous prime is 1285167959. The next prime is 1285167967. The reversal of 1285167960 is 697615821.

1285167960 is a `hidden beast` number, since 1 + 2 + 8 + 516 + 79 + 60 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285167967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28776 + ... + 58295.

It is an arithmetic number, because the mean of its divisors is an integer number (44569980).

Almost surely, 2^1285167960 is an apocalyptic number.

1285167960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285167960 is an abundant number, since it is smaller than the sum of its proper divisors (2993550120).

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

1285167960 is a wasteful number, since it uses less digits than its factorization.

1285167960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87129 (or 87122 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1285167960 is about 35849.2393224738. The cubic root of 1285167960 is about 1087.2263346268.

The spelling of 1285167960 in words is "one billion, two hundred eighty-five million, one hundred sixty-seven thousand, nine hundred sixty".