77550140 has 12 divisors (see below), whose sum is σ = 162855336. Its totient is φ = 31020048.

The previous prime is 77550091. The next prime is 77550157. The reversal of 77550140 is 4105577.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1938734 + ... + 1938773.

It is an arithmetic number, because the mean of its divisors is an integer number (13571278).

Almost surely, 2^77550140 is an apocalyptic number.

It is an amenable number.

77550140 is an abundant number, since it is smaller than the sum of its proper divisors (85305196).

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

77550140 is a wasteful number, since it uses less digits than its factorization.

77550140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3877516 (or 3877514 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 77550140 is about 8806.2557310130. The cubic root of 77550140 is about 426.4428744463.

The spelling of 77550140 in words is "seventy-seven million, five hundred fifty thousand, one hundred forty".