77471842 has 12 divisors (see below), whose sum is σ = 135180630. Its totient is φ = 33202176.

The previous prime is 77471827. The next prime is 77471857. The reversal of 77471842 is 24817477.

It is an interprime number because it is at equal distance from previous prime (77471827) and next prime (77471857).

It can be written as a sum of positive squares in only one way, i.e., 49688401 + 27783441 = 7049^2 + 5271^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77471795 and 77471804.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 395167 + ... + 395362.

Almost surely, 2^77471842 is an apocalyptic number.

77471842 is a deficient number, since it is larger than the sum of its proper divisors (57708788).

77471842 is a wasteful number, since it uses less digits than its factorization.

77471842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790545 (or 790538 counting only the distinct ones).

The product of its digits is 87808, while the sum is 40.

The square root of 77471842 is about 8801.8090186052. The cubic root of 77471842 is about 426.2993076834.

The spelling of 77471842 in words is "seventy-seven million, four hundred seventy-one thousand, eight hundred forty-two".