127722740 has 24 divisors (see below), whose sum is σ = 268485000. Its totient is φ = 51038208.

The previous prime is 127722733. The next prime is 127722809. The reversal of 127722740 is 47227721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 574564 + 127148176 = 758^2 + 11276^2 .

It is a junction number, because it is equal to n+sod(n) for n = 127722697 and 127722706.

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, 22424 + ... + 27536.

It is an arithmetic number, because the mean of its divisors is an integer number (11186875).

Almost surely, 2^127722740 is an apocalyptic number.

127722740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127722740 is an abundant number, since it is smaller than the sum of its proper divisors (140762260).

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

127722740 is a wasteful number, since it uses less digits than its factorization.

127722740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6371 (or 6369 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 32.

The square root of 127722740 is about 11301.4485797176. The cubic root of 127722740 is about 503.6042759597.

The spelling of 127722740 in words is "one hundred twenty-seven million, seven hundred twenty-two thousand, seven hundred forty".