248778642 has 32 divisors (see below), whose sum is σ = 569107584. Its totient is φ = 71020800.

The previous prime is 248778631. The next prime is 248778659. The reversal of 248778642 is 246877842.

It is a happy number.

248778642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 248778591 and 248778600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89392 + ... + 92132.

It is an arithmetic number, because the mean of its divisors is an integer number (17784612).

Almost surely, 2^248778642 is an apocalyptic number.

248778642 is an abundant number, since it is smaller than the sum of its proper divisors (320328942).

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

248778642 is a wasteful number, since it uses less digits than its factorization.

248778642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4914.

The product of its digits is 1204224, while the sum is 48.

The square root of 248778642 is about 15772.7182818942. The cubic root of 248778642 is about 628.9329733461.

The spelling of 248778642 in words is "two hundred forty-eight million, seven hundred seventy-eight thousand, six hundred forty-two".