77285940 has 24 divisors (see below), whose sum is σ = 216400800. Its totient is φ = 20609568.

The previous prime is 77285891. The next prime is 77285941. The reversal of 77285940 is 4958277.

It is a junction number, because it is equal to n+sod(n) for n = 77285892 and 77285901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77285941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 643990 + ... + 644109.

It is an arithmetic number, because the mean of its divisors is an integer number (9016700).

Almost surely, 2^77285940 is an apocalyptic number.

It is an amenable number.

77285940 is an abundant number, since it is smaller than the sum of its proper divisors (139114860).

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

77285940 is a wasteful number, since it uses less digits than its factorization.

77285940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288111 (or 1288109 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 77285940 is about 8791.2422330408. The cubic root of 77285940 is about 425.9580509289.

The spelling of 77285940 in words is "seventy-seven million, two hundred eighty-five thousand, nine hundred forty".