247448388 has 72 divisors (see below), whose sum is σ = 638651104. Its totient is φ = 74511360.

The previous prime is 247448371. The next prime is 247448393. The reversal of 247448388 is 883844742.

It is a happy number.

It is a super-2 number, since 2×247448388² = 122461409447597088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279795 + ... + 280677.

Almost surely, 2^247448388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247448388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319325552).

247448388 is an abundant number, since it is smaller than the sum of its proper divisors (391202716).

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

247448388 is a wasteful number, since it uses less digits than its factorization.

247448388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1092 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 48.

The square root of 247448388 is about 15730.4922999886. The cubic root of 247448388 is about 627.8099719853.

The spelling of 247448388 in words is "two hundred forty-seven million, four hundred forty-eight thousand, three hundred eighty-eight".