1421778960 has 160 divisors (see below), whose sum is σ = 5596903680. Its totient is φ = 324974592.

The previous prime is 1421778959. The next prime is 1421778977. The reversal of 1421778960 is 698771241.

It is a happy number.

It is a super-2 number, since 2×1421778960² = 4042910822197363200, which contains 22 as substring.

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

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, 31897 + ... + 62136.

It is an arithmetic number, because the mean of its divisors is an integer number (34980648).

Almost surely, 2^1421778960 is an apocalyptic number.

1421778960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421778960 is an abundant number, since it is smaller than the sum of its proper divisors (4175124720).

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

1421778960 is a wasteful number, since it uses less digits than its factorization.

1421778960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94062 (or 94050 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 1421778960 is about 37706.4843229915. The cubic root of 1421778960 is about 1124.4600431051.

The spelling of 1421778960 in words is "one billion, four hundred twenty-one million, seven hundred seventy-eight thousand, nine hundred sixty".