47747240 has 32 divisors (see below), whose sum is σ = 108227880. Its totient is φ = 18957312.

The previous prime is 47747233. The next prime is 47747261. The reversal of 47747240 is 4274774.

It can be written as a sum of positive squares in 4 ways, for example, as 47141956 + 605284 = 6866^2 + 778^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 47747240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1124 + ... + 9836.

Almost surely, 2^47747240 is an apocalyptic number.

47747240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47747240 is an abundant number, since it is smaller than the sum of its proper divisors (60480640).

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

47747240 is a wasteful number, since it uses less digits than its factorization.

47747240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8861 (or 8857 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 35.

The square root of 47747240 is about 6909.9377710657. The cubic root of 47747240 is about 362.7850852902.

The spelling of 47747240 in words is "forty-seven million, seven hundred forty-seven thousand, two hundred forty".