47142540 has 96 divisors (see below), whose sum is σ = 148968960. Its totient is φ = 12374208.

The previous prime is 47142533. The next prime is 47142541. The reversal of 47142540 is 4524174.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (47142541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35529 + ... + 36831.

It is an arithmetic number, because the mean of its divisors is an integer number (1551760).

Almost surely, 2^47142540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47142540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74484480).

47142540 is an abundant number, since it is smaller than the sum of its proper divisors (101826420).

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

47142540 is a wasteful number, since it uses less digits than its factorization.

47142540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388 (or 1380 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 47142540 is about 6866.0425282691. The cubic root of 47142540 is about 361.2470639880.

The spelling of 47142540 in words is "forty-seven million, one hundred forty-two thousand, five hundred forty".