247628880 has 80 divisors (see below), whose sum is σ = 852951360. Its totient is φ = 66033792.

The previous prime is 247628869. The next prime is 247628891. The reversal of 247628880 is 88826742.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (247628869) and next prime (247628891).

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

It is a super-2 number, since 2×247628880² = 122640124420108800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 55162 + ... + 59481.

It is an arithmetic number, because the mean of its divisors is an integer number (10661892).

Almost surely, 2^247628880 is an apocalyptic number.

247628880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247628880 is an abundant number, since it is smaller than the sum of its proper divisors (605322480).

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

247628880 is a wasteful number, since it uses less digits than its factorization.

247628880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114665 (or 114653 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 247628880 is about 15736.2282647399. The cubic root of 247628880 is about 627.9625790785.

The spelling of 247628880 in words is "two hundred forty-seven million, six hundred twenty-eight thousand, eight hundred eighty".