247475380 has 24 divisors (see below), whose sum is σ = 547051680. Its totient is φ = 93780000.

The previous prime is 247475317. The next prime is 247475383. The reversal of 247475380 is 83574742.

It is a super-2 number, since 2×247475380² = 122488127412288800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247475383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325246 + ... + 326005.

It is an arithmetic number, because the mean of its divisors is an integer number (22793820).

Almost surely, 2^247475380 is an apocalyptic number.

247475380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247475380 is an abundant number, since it is smaller than the sum of its proper divisors (299576300).

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

247475380 is a wasteful number, since it uses less digits than its factorization.

247475380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651279 (or 651277 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 40.

The square root of 247475380 is about 15731.3502281273. The cubic root of 247475380 is about 627.8327986049.

The spelling of 247475380 in words is "two hundred forty-seven million, four hundred seventy-five thousand, three hundred eighty".