247923648 has 168 divisors, whose sum is σ = 860157792. Its totient is φ = 66650112.

The previous prime is 247923619. The next prime is 247923649. The reversal of 247923648 is 846329742.

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×247923648² = 122932270475255808, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247923649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66736 + ... + 70352.

Almost surely, 2^247923648 is an apocalyptic number.

247923648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247923648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430078896).

247923648 is an abundant number, since it is smaller than the sum of its proper divisors (612234144).

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

247923648 is a wasteful number, since it uses less digits than its factorization.

247923648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659 (or 3646 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 247923648 is about 15745.5913829872. The cubic root of 247923648 is about 628.2116478670.

The spelling of 247923648 in words is "two hundred forty-seven million, nine hundred twenty-three thousand, six hundred forty-eight".