77774090 has 8 divisors (see below), whose sum is σ = 139993380. Its totient is φ = 31109632.

The previous prime is 77774083. The next prime is 77774093. The reversal of 77774090 is 9047777.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63568729 + 14205361 = 7973^2 + 3769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (77774093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3888695 + ... + 3888714.

Almost surely, 2^77774090 is an apocalyptic number.

77774090 is a deficient number, since it is larger than the sum of its proper divisors (62219290).

77774090 is a wasteful number, since it uses less digits than its factorization.

77774090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7777416.

The product of its (nonzero) digits is 86436, while the sum is 41.

The square root of 77774090 is about 8818.9619570559. The cubic root of 77774090 is about 426.8529751396.

The spelling of 77774090 in words is "seventy-seven million, seven hundred seventy-four thousand, ninety".