1421971488 has 288 divisors, whose sum is σ = 4861688832. Its totient is φ = 385689600.

The previous prime is 1421971483. The next prime is 1421971501. The reversal of 1421971488 is 8841791241.

It is a tau number, because it is divible by the number of its divisors (288).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421971483) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3812070 + ... + 3812442.

It is an arithmetic number, because the mean of its divisors is an integer number (16880864).

Almost surely, 2^1421971488 is an apocalyptic number.

1421971488 is a gapful number since it is divisible by the number (18) 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 1421971488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2430844416).

1421971488 is an abundant number, since it is smaller than the sum of its proper divisors (3439717344).

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

1421971488 is a wasteful number, since it uses less digits than its factorization.

1421971488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 477 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 1421971488 is about 37709.0372192131. The cubic root of 1421971488 is about 1124.5107964871.

The spelling of 1421971488 in words is "one billion, four hundred twenty-one million, nine hundred seventy-one thousand, four hundred eighty-eight".