47745440 has 24 divisors (see below), whose sum is σ = 112798980. Its totient is φ = 19098112.

The previous prime is 47745419. The next prime is 47745463. The reversal of 47745440 is 4454774.

It can be written as a sum of positive squares in 2 ways, for example, as 45751696 + 1993744 = 6764^2 + 1412^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 47745440.

It is a congruent number.

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, 149045 + ... + 149364.

Almost surely, 2^47745440 is an apocalyptic number.

47745440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47745440 is an abundant number, since it is smaller than the sum of its proper divisors (65053540).

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

47745440 is a wasteful number, since it uses less digits than its factorization.

47745440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298424 (or 298416 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 35.

The square root of 47745440 is about 6909.8075226449. The cubic root of 47745440 is about 362.7805264134.

The spelling of 47745440 in words is "forty-seven million, seven hundred forty-five thousand, four hundred forty".