47646840 has 32 divisors (see below), whose sum is σ = 142940880. Its totient is φ = 12705792.

The previous prime is 47646829. The next prime is 47646847. The reversal of 47646840 is 4864674.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47646847) 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, 198409 + ... + 198648.

Almost surely, 2^47646840 is an apocalyptic number.

47646840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47646840 is an abundant number, since it is smaller than the sum of its proper divisors (95294040).

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

47646840 is a wasteful number, since it uses less digits than its factorization.

47646840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397071 (or 397067 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 47646840 is about 6902.6690489984. The cubic root of 47646840 is about 362.5306260292.

The spelling of 47646840 in words is "forty-seven million, six hundred forty-six thousand, eight hundred forty".