77293404 has 18 divisors (see below), whose sum is σ = 195380640. Its totient is φ = 25764456.

The previous prime is 77293367. The next prime is 77293417. The reversal of 77293404 is 40439277.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2147039 = 77293404 / (7 + 7 + 2 + 9 + 3 + 4 + 0 + 4).

It is a congruent 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, 1073484 + ... + 1073555.

It is an arithmetic number, because the mean of its divisors is an integer number (10854480).

Almost surely, 2^77293404 is an apocalyptic number.

It is an amenable number.

77293404 is an abundant number, since it is smaller than the sum of its proper divisors (118087236).

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

77293404 is a wasteful number, since it uses less digits than its factorization.

77293404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147049 (or 2147044 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 77293404 is about 8791.6667361769. Note that the first 3 decimals coincide. The cubic root of 77293404 is about 425.9717629898.

The spelling of 77293404 in words is "seventy-seven million, two hundred ninety-three thousand, four hundred four".