1427981976 has 24 divisors (see below), whose sum is σ = 3867451380. Its totient is φ = 475993968.

The previous prime is 1427981899. The next prime is 1427981977. The reversal of 1427981976 is 6791897241.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427981977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9916470 + ... + 9916613.

Almost surely, 2^1427981976 is an apocalyptic number.

It is an amenable number.

1427981976 is an abundant number, since it is smaller than the sum of its proper divisors (2439469404).

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

1427981976 is a wasteful number, since it uses less digits than its factorization.

1427981976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19833095 (or 19833088 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 1427981976 is about 37788.6487718204. The cubic root of 1427981976 is about 1126.0929562014.

The spelling of 1427981976 in words is "one billion, four hundred twenty-seven million, nine hundred eighty-one thousand, nine hundred seventy-six".