77402 has 12 divisors (see below), whose sum is σ = 126270. Its totient is φ = 35568.

The previous prime is 77383. The next prime is 77417. The reversal of 77402 is 20477.

It can be written as a sum of positive squares in 3 ways, for example, as 58081 + 19321 = 241^2 + 139^2 .

It is an Ulam number.

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, 224 + ... + 452.

2⁷⁷⁴⁰² is an apocalyptic number.

77402 is a deficient number, since it is larger than the sum of its proper divisors (48868).

77402 is a wasteful number, since it uses less digits than its factorization.

77402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 77402 is about 278.2121492674. The cubic root of 77402 is about 42.6171164145.

Adding to 77402 its reverse (20477), we get a palindrome (97879).

The spelling of 77402 in words is "seventy-seven thousand, four hundred two", and thus it is an iban number.