77448372 has 12 divisors (see below), whose sum is σ = 180712896. Its totient is φ = 25816120.

The previous prime is 77448347. The next prime is 77448409. The reversal of 77448372 is 27384477.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 3227004 + ... + 3227027.

It is an arithmetic number, because the mean of its divisors is an integer number (15059408).

Almost surely, 2^77448372 is an apocalyptic number.

It is an amenable number.

77448372 is an abundant number, since it is smaller than the sum of its proper divisors (103264524).

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

77448372 is a wasteful number, since it uses less digits than its factorization.

77448372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6454038 (or 6454036 counting only the distinct ones).

The product of its digits is 263424, while the sum is 42.

The square root of 77448372 is about 8800.4756689624. The cubic root of 77448372 is about 426.2562543837.

The spelling of 77448372 in words is "seventy-seven million, four hundred forty-eight thousand, three hundred seventy-two".