47907840 has 88 divisors (see below), whose sum is σ = 153279360. Its totient is φ = 12771328.

The previous prime is 47907833. The next prime is 47907841. The reversal of 47907840 is 4870974.

It is a super-2 number, since 2×47907840² = 4590322266931200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47907841) 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, 13801 + ... + 16919.

Almost surely, 2^47907840 is an apocalyptic number.

47907840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47907840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76639680).

47907840 is an abundant number, since it is smaller than the sum of its proper divisors (105371520).

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

47907840 is a wasteful number, since it uses less digits than its factorization.

47907840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3147 (or 3129 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 47907840 is about 6921.5489595899. The cubic root of 47907840 is about 363.1913781130.

The spelling of 47907840 in words is "forty-seven million, nine hundred seven thousand, eight hundred forty".