247065040 has 40 divisors (see below), whose sum is σ = 592962048. Its totient is φ = 95637120.

The previous prime is 247065023. The next prime is 247065059. The reversal of 247065040 is 40560742.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×247065040² = 122082267980403200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47332 + ... + 52291.

Almost surely, 2^247065040 is an apocalyptic number.

247065040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247065040 is an abundant number, since it is smaller than the sum of its proper divisors (345897008).

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

247065040 is a wasteful number, since it uses less digits than its factorization.

247065040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99667 (or 99661 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 247065040 is about 15718.3027073536. The cubic root of 247065040 is about 627.4856025437.

The spelling of 247065040 in words is "two hundred forty-seven million, sixty-five thousand, forty".