47122740 has 144 divisors (see below), whose sum is σ = 165110400. Its totient is φ = 10656000.

The previous prime is 47122739. The next prime is 47122753. The reversal of 47122740 is 4722174.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187615 + ... + 187865.

It is an arithmetic number, because the mean of its divisors is an integer number (1146600).

Almost surely, 2^47122740 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 47122740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82555200).

47122740 is an abundant number, since it is smaller than the sum of its proper divisors (117987660).

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

47122740 is a wasteful number, since it uses less digits than its factorization.

47122740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 47122740 is about 6864.6004982082. The cubic root of 47122740 is about 361.1964819766.

The spelling of 47122740 in words is "forty-seven million, one hundred twenty-two thousand, seven hundred forty".