77331402 has 32 divisors (see below), whose sum is σ = 181958400. Its totient is φ = 24260544.

The previous prime is 77331389. The next prime is 77331421. The reversal of 77331402 is 20413377.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41202 + ... + 43037.

It is an arithmetic number, because the mean of its divisors is an integer number (5686200).

Almost surely, 2^77331402 is an apocalyptic number.

77331402 is an abundant number, since it is smaller than the sum of its proper divisors (104626998).

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

77331402 is a wasteful number, since it uses less digits than its factorization.

77331402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84267 (or 84261 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 77331402 is about 8793.8274943281. The cubic root of 77331402 is about 426.0415551607.

Adding to 77331402 its reverse (20413377), we get a palindrome (97744779).

The spelling of 77331402 in words is "seventy-seven million, three hundred thirty-one thousand, four hundred two".