77442248 has 16 divisors (see below), whose sum is σ = 156373980. Its totient is φ = 35742528.

The previous prime is 77442139. The next prime is 77442251. The reversal of 77442248 is 84224477.

It can be written as a sum of positive squares in 2 ways, for example, as 64032004 + 13410244 = 8002^2 + 3662^2 .

It is a super-3 number, since 3×77442248³ (a number of 25 digits) contains 333 as substring.

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, 372215 + ... + 372422.

Almost surely, 2^77442248 is an apocalyptic number.

It is an amenable number.

77442248 is an abundant number, since it is smaller than the sum of its proper divisors (78931732).

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

77442248 is a wasteful number, since it uses less digits than its factorization.

77442248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744656 (or 744652 counting only the distinct ones).

The product of its digits is 100352, while the sum is 38.

The square root of 77442248 is about 8800.1277263458. The cubic root of 77442248 is about 426.2450191051.

The spelling of 77442248 in words is "seventy-seven million, four hundred forty-two thousand, two hundred forty-eight".