727776540 has 72 divisors (see below), whose sum is σ = 2210710320. Its totient is φ = 193799424.

The previous prime is 727776487. The next prime is 727776563. The reversal of 727776540 is 45677727.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146416 + ... + 151304.

It is an arithmetic number, because the mean of its divisors is an integer number (30704310).

Almost surely, 2^727776540 is an apocalyptic number.

It is an amenable number.

727776540 is an abundant number, since it is smaller than the sum of its proper divisors (1482933780).

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

727776540 is a wasteful number, since it uses less digits than its factorization.

727776540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731 (or 5726 counting only the distinct ones).

The product of its (nonzero) digits is 576240, while the sum is 45.

The square root of 727776540 is about 26977.3338193380. Note that the first 3 decimals coincide. The cubic root of 727776540 is about 899.4962365961.

The spelling of 727776540 in words is "seven hundred twenty-seven million, seven hundred seventy-six thousand, five hundred forty".