1422639972 has 216 divisors, whose sum is σ = 4241852160. Its totient is φ = 400308480.

The previous prime is 1422639971. The next prime is 1422639989. The reversal of 1422639972 is 2799362241.

1422639972 is a `hidden beast` number, since 1 + 4 + 2 + 2 + 639 + 9 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1422639971) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3583278 + ... + 3583674.

Almost surely, 2^1422639972 is an apocalyptic number.

1422639972 is a gapful number since it is divisible by the number (12) 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 1422639972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2120926080).

1422639972 is an abundant number, since it is smaller than the sum of its proper divisors (2819212188).

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

1422639972 is a wasteful number, since it uses less digits than its factorization.

1422639972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 465 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 1422639972 is about 37717.8998885145. The cubic root of 1422639972 is about 1124.6869837303.

The spelling of 1422639972 in words is "one billion, four hundred twenty-two million, six hundred thirty-nine thousand, nine hundred seventy-two".