47172340 has 12 divisors (see below), whose sum is σ = 99061956. Its totient is φ = 18868928.

The previous prime is 47172311. The next prime is 47172343. The reversal of 47172340 is 4327174.

It can be written as a sum of positive squares in 2 ways, for example, as 17338896 + 29833444 = 4164^2 + 5462^2 .

It is a super-2 number, since 2×47172340² = 4450459322151200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47172299 and 47172308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47172343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179289 + ... + 1179328.

It is an arithmetic number, because the mean of its divisors is an integer number (8255163).

Almost surely, 2^47172340 is an apocalyptic number.

It is an amenable number.

47172340 is an abundant number, since it is smaller than the sum of its proper divisors (51889616).

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

47172340 is a wasteful number, since it uses less digits than its factorization.

47172340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358626 (or 2358624 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 47172340 is about 6868.2122855951. The cubic root of 47172340 is about 361.3231657777.

The spelling of 47172340 in words is "forty-seven million, one hundred seventy-two thousand, three hundred forty".