77069478 has 8 divisors (see below), whose sum is σ = 154138968. Its totient is φ = 25689824.

The previous prime is 77069437. The next prime is 77069479. The reversal of 77069478 is 87496077.

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

77069478 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77069479) 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, 6422451 + ... + 6422462.

It is an arithmetic number, because the mean of its divisors is an integer number (19267371).

Almost surely, 2^77069478 is an apocalyptic number.

77069478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77069478 is a wasteful number, since it uses less digits than its factorization.

77069478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12844918.

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 77069478 is about 8778.9223712253. The cubic root of 77069478 is about 425.5600054930.

The spelling of 77069478 in words is "seventy-seven million, sixty-nine thousand, four hundred seventy-eight".