47838840 has 64 divisors (see below), whose sum is σ = 164021760. Its totient is φ = 10934400.

The previous prime is 47838839. The next prime is 47838853. The reversal of 47838840 is 4883874.

It is a super-2 number, since 2×47838840² = 4577109225091200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 47838792 and 47838801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27636 + ... + 29315.

It is an arithmetic number, because the mean of its divisors is an integer number (2562840).

Almost surely, 2^47838840 is an apocalyptic number.

47838840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47838840 is an abundant number, since it is smaller than the sum of its proper divisors (116182920).

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

47838840 is a wasteful number, since it uses less digits than its factorization.

47838840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56972 (or 56968 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 47838840 is about 6916.5627301428. The cubic root of 47838840 is about 363.0169303550.

The spelling of 47838840 in words is "forty-seven million, eight hundred thirty-eight thousand, eight hundred forty".