1421616880 has 80 divisors (see below), whose sum is σ = 3384426240. Its totient is φ = 555137024.

The previous prime is 1421616877. The next prime is 1421616893. The reversal of 1421616880 is 886161241.

It is a tau number, because it is divible by the number of its divisors (80).

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, 987201 + ... + 988639.

It is an arithmetic number, because the mean of its divisors is an integer number (42305328).

Almost surely, 2^1421616880 is an apocalyptic number.

1421616880 is a gapful number since it is divisible by the number (10) 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 1421616880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1692213120).

1421616880 is an abundant number, since it is smaller than the sum of its proper divisors (1962809360).

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

1421616880 is a wasteful number, since it uses less digits than its factorization.

1421616880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738 (or 1732 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 1421616880 is about 37704.3350292775. The cubic root of 1421616880 is about 1124.4173127382.

The spelling of 1421616880 in words is "one billion, four hundred twenty-one million, six hundred sixteen thousand, eight hundred eighty".