47172240 has 80 divisors (see below), whose sum is σ = 162489600. Its totient is φ = 12578688.

The previous prime is 47172239. The next prime is 47172259. The reversal of 47172240 is 4227174.

It is a happy number.

47172240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8760 + ... + 13079.

It is an arithmetic number, because the mean of its divisors is an integer number (2031120).

Almost surely, 2^47172240 is an apocalyptic number.

47172240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47172240 is an abundant number, since it is smaller than the sum of its proper divisors (115317360).

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

47172240 is a wasteful number, since it uses less digits than its factorization.

47172240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21861 (or 21849 counting only the distinct ones).

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

The square root of 47172240 is about 6868.2050056765. The cubic root of 47172240 is about 361.3229104561.

The spelling of 47172240 in words is "forty-seven million, one hundred seventy-two thousand, two hundred forty".