1272428976 has 160 divisors (see below), whose sum is σ = 4176621568. Its totient is φ = 324725760.

The previous prime is 1272428957. The next prime is 1272429017. The reversal of 1272428976 is 6798242721.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 130710 + ... + 140106.

Almost surely, 2^1272428976 is an apocalyptic number.

1272428976 is a gapful number since it is divisible by the number (16) 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 1272428976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2088310784).

1272428976 is an abundant number, since it is smaller than the sum of its proper divisors (2904192592).

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

1272428976 is a wasteful number, since it uses less digits than its factorization.

1272428976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9459 (or 9453 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 1272428976 is about 35671.1224381852. The cubic root of 1272428976 is about 1083.6220910944.

The spelling of 1272428976 in words is "one billion, two hundred seventy-two million, four hundred twenty-eight thousand, nine hundred seventy-six".