247672720 has 40 divisors (see below), whose sum is σ = 578462976. Its totient is φ = 98617728.

The previous prime is 247672697. The next prime is 247672727. The reversal of 247672720 is 27276742.

247672720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×247672720² = 122683552464396800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 247672720.

It is not an unprimeable number, because it can be changed into a prime (247672727) 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, 10899 + ... + 24781.

Almost surely, 2^247672720 is an apocalyptic number.

247672720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247672720 is an abundant number, since it is smaller than the sum of its proper divisors (330790256).

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

247672720 is a wasteful number, since it uses less digits than its factorization.

247672720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14119 (or 14113 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 37.

The square root of 247672720 is about 15737.6211671269. The cubic root of 247672720 is about 627.9996348734. Note that the first 3 decimals are identical.

The spelling of 247672720 in words is "two hundred forty-seven million, six hundred seventy-two thousand, seven hundred twenty".