77901378 has 16 divisors (see below), whose sum is σ = 164967840. Its totient is φ = 24439616.

The previous prime is 77901301. The next prime is 77901403. The reversal of 77901378 is 87310977.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381768 + ... + 381971.

It is an arithmetic number, because the mean of its divisors is an integer number (10310490).

Almost surely, 2^77901378 is an apocalyptic number.

77901378 is an abundant number, since it is smaller than the sum of its proper divisors (87066462).

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

77901378 is a wasteful number, since it uses less digits than its factorization.

77901378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763761.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 77901378 is about 8826.1757290460. The cubic root of 77901378 is about 427.0857160911.

The spelling of 77901378 in words is "seventy-seven million, nine hundred one thousand, three hundred seventy-eight".