127420728 has 32 divisors (see below), whose sum is σ = 320403600. Its totient is φ = 42226688.

The previous prime is 127420681. The next prime is 127420753. The reversal of 127420728 is 827024721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11193 + ... + 19496.

Almost surely, 2^127420728 is an apocalyptic number.

It is an amenable number.

127420728 is an abundant number, since it is smaller than the sum of its proper divisors (192982872).

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

127420728 is a wasteful number, since it uses less digits than its factorization.

127420728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30871 (or 30867 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 127420728 is about 11288.0790216936. The cubic root of 127420728 is about 503.2070233567.

Multiplying 127420728 by its sum of digits (33), we get a palindrome (4204884024).

The spelling of 127420728 in words is "one hundred twenty-seven million, four hundred twenty thousand, seven hundred twenty-eight".