77420074 has 8 divisors (see below), whose sum is σ = 122961348. Its totient is φ = 36432960.

The previous prime is 77420071. The next prime is 77420137. The reversal of 77420074 is 47002477.

77420074 = 1207² + 1208² + ... + 1257².

It can be written as a sum of positive squares in 2 ways, for example, as 61074225 + 16345849 = 7815^2 + 4043^2 .

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 (77420071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1138497 + ... + 1138564.

Almost surely, 2^77420074 is an apocalyptic number.

77420074 is a deficient number, since it is larger than the sum of its proper divisors (45541274).

77420074 is a wasteful number, since it uses less digits than its factorization.

77420074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277080.

The product of its (nonzero) digits is 10976, while the sum is 31.

The square root of 77420074 is about 8798.8677680711. The cubic root of 77420074 is about 426.2043330476.

The spelling of 77420074 in words is "seventy-seven million, four hundred twenty thousand, seventy-four".