248654640 has 80 divisors (see below), whose sum is σ = 830134368. Its totient is φ = 61206528.

The previous prime is 248654639. The next prime is 248654657. The reversal of 248654640 is 46456842.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (39).

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 15 ways as a sum of consecutive naturals, for example, 36729 + ... + 42968.

Almost surely, 2^248654640 is an apocalyptic number.

248654640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

248654640 is an abundant number, since it is smaller than the sum of its proper divisors (581479728).

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

248654640 is a wasteful number, since it uses less digits than its factorization.

248654640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79726 (or 79720 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The square root of 248654640 is about 15768.7868905633. The cubic root of 248654640 is about 628.8284602105.

The spelling of 248654640 in words is "two hundred forty-eight million, six hundred fifty-four thousand, six hundred forty".