77400442 has 8 divisors (see below), whose sum is σ = 132686496. Its totient is φ = 33171612.

The previous prime is 77400431. The next prime is 77400443. The reversal of 77400442 is 24400477.

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

It is a self number, because there is not a number n which added to its sum of digits gives 77400442.

It is not an unprimeable number, because it can be changed into a prime (77400443) 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, 2764288 + ... + 2764315.

It is an arithmetic number, because the mean of its divisors is an integer number (16585812).

Almost surely, 2^77400442 is an apocalyptic number.

77400442 is a deficient number, since it is larger than the sum of its proper divisors (55286054).

77400442 is a wasteful number, since it uses less digits than its factorization.

77400442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5528612.

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 77400442 is about 8797.7520992581. The cubic root of 77400442 is about 426.1683047051.

The spelling of 77400442 in words is "seventy-seven million, four hundred thousand, four hundred forty-two".