47693440 has 32 divisors (see below), whose sum is σ = 114018660. Its totient is φ = 19077120.

The previous prime is 47693389. The next prime is 47693461. The reversal of 47693440 is 4439674.

It can be written as a sum of positive squares in 2 ways, for example, as 47665216 + 28224 = 6904^2 + 168^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 47693440.

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, 36621 + ... + 37900.

Almost surely, 2^47693440 is an apocalyptic number.

47693440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47693440 is an abundant number, since it is smaller than the sum of its proper divisors (66325220).

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

47693440 is an equidigital number, since it uses as much as digits as its factorization.

47693440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74540 (or 74528 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 47693440 is about 6906.0437299513. The cubic root of 47693440 is about 362.6487760302.

The spelling of 47693440 in words is "forty-seven million, six hundred ninety-three thousand, four hundred forty".