247650940 has 48 divisors (see below), whose sum is σ = 565125120. Its totient is φ = 90815040.

The previous prime is 247650929. The next prime is 247650941. The reversal of 247650940 is 49056742.

It is a super-2 number, since 2×247650940² = 122661976165767200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247650940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247650941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1269 + ... + 22291.

It is an arithmetic number, because the mean of its divisors is an integer number (11773440).

Almost surely, 2^247650940 is an apocalyptic number.

247650940 is a gapful number since it is divisible by the number (20) 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 247650940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282562560).

247650940 is an abundant number, since it is smaller than the sum of its proper divisors (317474180).

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

247650940 is a wasteful number, since it uses less digits than its factorization.

247650940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21082 (or 21080 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 247650940 is about 15736.9291794810. The cubic root of 247650940 is about 627.9812258577.

The spelling of 247650940 in words is "two hundred forty-seven million, six hundred fifty thousand, nine hundred forty".