47121440 has 24 divisors (see below), whose sum is σ = 111324780. Its totient is φ = 18848512.

The previous prime is 47121413. The next prime is 47121469. The reversal of 47121440 is 4412174.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38987536 + 8133904 = 6244^2 + 2852^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147095 + ... + 147414.

Almost surely, 2^47121440 is an apocalyptic number.

47121440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47121440 is an abundant number, since it is smaller than the sum of its proper divisors (64203340).

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

47121440 is a wasteful number, since it uses less digits than its factorization.

47121440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294524 (or 294516 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 47121440 is about 6864.5058088693. The cubic root of 47121440 is about 361.1931604398.

The spelling of 47121440 in words is "forty-seven million, one hundred twenty-one thousand, four hundred forty".