47280840 has 32 divisors (see below), whose sum is σ = 141842880. Its totient is φ = 12608192.

The previous prime is 47280833. The next prime is 47280851. The reversal of 47280840 is 4808274.

It is a super-2 number, since 2×47280840² = 4470955662211200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 196884 + ... + 197123.

It is an arithmetic number, because the mean of its divisors is an integer number (4432590).

Almost surely, 2^47280840 is an apocalyptic number.

47280840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47280840 is an abundant number, since it is smaller than the sum of its proper divisors (94562040).

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

47280840 is a wasteful number, since it uses less digits than its factorization.

47280840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394021 (or 394017 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 47280840 is about 6876.1064564185. The cubic root of 47280840 is about 361.5999773214.

The spelling of 47280840 in words is "forty-seven million, two hundred eighty thousand, eight hundred forty".