47313840 has 80 divisors (see below), whose sum is σ = 167632128. Its totient is φ = 10814208.

The previous prime is 47313823. The next prime is 47313841. The reversal of 47313840 is 4831374.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 47313798 and 47313807.

It is not an unprimeable number, because it can be changed into a prime (47313841) 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, 12402 + ... + 15761.

Almost surely, 2^47313840 is an apocalyptic number.

47313840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47313840 is an abundant number, since it is smaller than the sum of its proper divisors (120318288).

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

47313840 is a wasteful number, since it uses less digits than its factorization.

47313840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28186 (or 28180 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 47313840 is about 6878.5056516659. The cubic root of 47313840 is about 361.6840848523.

The spelling of 47313840 in words is "forty-seven million, three hundred thirteen thousand, eight hundred forty".